phương pháp giải bài tập sóng cơ học - Pdf 24

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/−.∀π∃1.,Θ&τ%−.ωξ&ΩθΩφ∃Ωω23π−.−Υθ−.Ω&∗%Ρτωα2∃⊥ΡΡτ,−.ιΦΥ1
−+2+∗∴εσ%,Ωδ−.2}%−ωα2/&Ξ−1
−+)ψ−Ρς2Ρτ∗υ[−2}%−ωα2/&Ξ−1
ΖϖΖ
%ΡιΦΥΧ3π−.−Υθ−.Χ)ψυ−∀σΩ1
+∗∴εσ%,Ωδ−.
∀
ιΦ



4Υ


+Α≅δΡ−.ωξ&−.γ&/ξ/&Ξ−Ρτϖ−.Ρ+βυ2θ3π−.−Υθ−.∗%∃⊥ΡΡτ,−.ι3.&υΧ∴+,−.
2Σ2+.&%+%&−.−Υθ−.∋Θ∀π∃11−+Ρη−ΥςΥθ−./&Ξ−1)Θ)ψ−Ρς2Ρτ∗υ[−Υθ−./&Ξ−1
91πΧ3Γ3ΧΓ∃Υ 143Γ∃Υ   13Γ3ΧΓ∃Υ 143Γ2∃Υ
 
%#!∋Ξ!∋ΖϖΖ(1!ϑ
ΗϒΡΡο&∃δΡΩ&Ξ∃2θ∀π−.−Υθ−.Ρτ∗υ[−∗%−.)α&2+∗∴Τ1
 

  

 
1Σ2Ω_−+Ρη−Υςσ%,Ωδ−.1
∀ ∀
πΧ3Γ
4
 

  

ΗΣ2Ω_−+)ψ−Ρς2Ρτ∗υ[−Υθ−.
 

    
 

    

 !


πΧ∀3Γ∃)∀Γ∃Υ1

+1≅δΡΥθ−.2θΡη−ΥςΓππ)ΘΡς2Ωδ∋%−Ρτ∗υ[−Γπ∃Υ1Ψ&+%&Ω&Ξ∃.η−−+βΡΡτ−
{+ωρ−.Ρτ∗υ[−Υθ−.2Σ2+−+%∗∃δΡ∴+,−./%,−+&∗ΩΞ.&%2+−.2θΩδ∋]2+{+%
4

€
+
%2θ(


πΧι∃


3

4

σ


πΧπ≤ιΓ∃≤ΧιΓ2∃1

+1≅δΡΥθ−.∃Ρτ∗υ[−Ρτ,−.Ρ+ϒ{)α&Ρς2ΩδΓπππ∃Υ1&φΡΩδ∋]2+{+%2}%Υθ−.∃Ωθ
+%&Ω&Ξ∃.η−−+%∗−+βΡ2Σ2+−+%∗3∃Ρτ−2−.∃δΡ{+ωρ−.Ρτ∗υ[−Υθ−.∋Θ
3

1−+/ωα2
Υθ−.)ΘΡη−Υς2}%Υθ−.∃Ωθ1
+

%2θ(



3



Φσ∃


3
πΧΓΥ


3)


Φ∃Υ1

+1≅δΡΥθ−.−.%−.Ρτ∗υ[−Ρτ−Υ&συτβΡσΘ&2θ{+ωρ−.ΡτΤ−+Υθ−.∋Θ(∗Φ2,Υ4Ρ
πΧπ31τ,−.Ωθ∗)ΘΩω2Ρ−+/−.2∃)ΘΡΡ−+/−..&υ1ΖυΣ2Ω_−+(&−ΩδΧΡη−
ΥςΧ/ωα2Υθ−.)Θ)ψ−Ρς2Ρτ∗υ[−Υθ−.1
+
 !

 !

ι
%2θ(9Φ2∃

13

3∴∴


1
∴
∃%



∃%
3Χ∀

∃&−



∃&−
∀ΧΦ1Τ∴⁄−−∴3

∃
Γπ1
+(≅δΡ−.ωξ&∗%−ΥΣΡ∃δΡ2+&φ2{+%,−′&∋−Ρτ−∃⊥Ρ/&Ξ−)ΘΡ+βυ−θ−+ϖ∋−2%,Φ
∋η−Ρτ,−.∀Γ.&υΧ2,&Υθ−./&φ−∋ΘΥθ−.−.%−.1−+2+∗∴εσ%,Ωδ−.2}%Υθ−./&Ξ−€
91Υ14Υ1ΓΥ1ΦΥ
=%&∋∀( )∗+, − !./ 0#%




∀π Γ

 

 
  
∗.
3
1 1Γ 3 
Γ
  #
   &∋
∃1 Χ ∆ Ε3 4+ΦΓ4



+Α
3ππι1≅δΡ−.∗γ−{+ΣΡΥθ−.σ%,Ωδ−.Ρ+∼,{+ωρ−.ΡτΤ−+∗%2,Υ3πΡ2∃1
τ,−. ∴+,−.Ρ+ξ& .&%− 3Υ Υθ−. Ρτ∗υ[− Ω Ωω2 ∗Ζ−.Ωωξ−. /−. /%,−+&∗ ∋η−/ωα2
Υθ−.€
 ϑ1∀π1  (13π1 11π1 +14π1
=%Η1 .Ι.+ϑ∗

 

+∗.
3 3
πΧ∀ 

 

τ%σ€
 ϑ1πΧ∀∀Φ∃1  (1πΧ4ιΦ∃1 1πΧ3∃1 +14Χ3≤Γ∃1
=%)Φ%.1 3 Ι26404
3 1


 


  
Ρ∗.
Φ




.1 23%
Γπ
πΧι 
Γππ

#

   
Α∗∃Υ Χ:Ι#4
πΧι
πΧ∀∀Φ 
Φ Φ
 #


3ΧΓ
πΧ≤

 
 

   
Μ.1 23
Φπ
πΧ≤ 
4Γπ

#

   
ΝΛςΩ7&

+(
ψ−Ρς2Ρτ∗υ[−∃Ρτ,−.∴+ϖ−.∴+∋Θ4π∃ΥΧ∴+,−.2Σ2+.&%+%&Ω&Ξ∃.η−−+%∗
−+βΡΡτ−2−.∃δΡ{+ωρ−.Ρτ∗υ[−Υθ−.σ%,Ωδ−.−.ω2{+%−+%∗∋ΘπΧ≤∃1η−Υς∃∋Θ(
91≤Γ1∀ιπ13ππ133Γ
Β)Φ3 126  ?∃2640
3 1
31 ∀



 

   

Ψ Ψ
   
−.4∋η−

+(&]∗{+%2}%3Υθ−..&ς−.−+%∗{+&/−./%,−+&∗ΩΞ∴+&.&%,Ρ+,%Υθ−.+,Θ−Ρ,Θ−
Ρτ&]ΡΡ&∗1
91π    1ƒ4  1ƒ3   1ƒ

(Ωδ∋]2+{+%2}%3Υθ−..&ς−.−+%∗∋Θ(
3 ∀

 
  
Ρ+Τ∴+&.&%,Ρ+,%2+−.∃α&Ρτ&]Ρ
Ρ&∗1βυ∴πΡ%2θ
 
 


 !

 !


+ Τ∃ )ψ− Ρς2 Υθ−. ∃ /&Ξ∗ Ρ+_ /& {+ωρ−. ΡτΤ−+( ∗  3≤2,Υ3π  3πππΡ
914∃Υ  1∀∃Υ 1∀4∃Υ 1∀ππ∃Υ
(
Σ{ σ−.{+ωρ−. ΡτΤ−+ Υθ−. ( 
3
1 1  

+Ι≅δΡ∃&−+−Ωω2.−)Θ,Ωη∗2}%∃δΡ∋ΣΡ+ϒ{−∃−.%−.)Θ2+ο∃)Θ,
∃⊥Ρ −ωα21 +& Ωη∗ ∋Σ Ρ+ϒ{ σ%, Ωδ−. Ρ+∼, {+ωρ−. Ρ+♣−. Ω−. )α& Ρη− Υς   ∀ππ
ΧΡο,Ρτ−∃⊥Ρ−ωα2∃δΡΥθ−.2θ/&−Ωδ%πΧΓ2∃1&φΡ∴+,−.2Σ2+.&%
.−∋γ&∋&−Ρ&φ{∋Θ42∃1−+)ψ−Ρς2Ρτ∗υ[−Υθ−.Ρτ−∃⊥Ρ−ωα21
91∀ππ2∃Υ   1Γπ2∃Υ  1∀ππ2∃Υ 1∀Γπ2∃Υ
(Σ{σ−.2ϖ−.Ρ+2Ρτ2−.+&]∃∴+,−.2Σ2+.&%−−.−Υθ−.∋&−Ρ&φ{∋Θ(

 ∀
4 

 
τ,−.Ωθ−∋ΘΥς−.−Υθ−.(Ρ%2θ

4
4  ∀ πΧΓ

     
2∃ψυ
1 ∀ππ1πΧΓ Γπ  
  # 

  

+Τ−)Θ,+Τ−+)♦Ρ%Ρ+βυΡχ−.−Υθ−.Ρ+∀Ωφ−−.−Υθ−.Ρ+2Σ2+−+%∗≤









3
∀π2,Υ


Ω
1
+,−. 2Σ2+.&%+%&Ω&Ξ∃ .η− −+%∗−+βΡΡτ− {+ωρ−.Ρτ∗υ[−Υθ−.∃Θ Ρο& Ωθσ%,
Ωδ−.2}%2Σ2{+η−Ρ|∃ϖ&Ρτωξ−.∋]2+{+%−+%∗
3

∋ΘΓ∃1ΖυΡ−+)ψ−Ρς2Ρτ∗υ[−
Υθ−.1
91∀Γπ∃Υ  1∀3π∃Υ   1∀ππ∃Υ  13ππ∃Υ

+(
δ∋]2+{+%.&%+%&{+η−Ρ|Ρτ−{+ωρ−.Ρτ∗υ[−Υθ−.∋Θ(













3 3
#
 

 
 
 
   


+ΙΑ
+,∃δΡ∃&−+−2+ο∃−+♥)Θ,∃⊥Ρ−ωα2)Θσ%,Ωδ−.Ω&[∗+,Θ)α&Ρη−Υς3π
1 .ωξ& Ρ% Ρ+βυ τ−. +%& Ω&Ξ∃ 9 )Θ  Ρτ− ∃⊥Ρ −ωα2 2−. −∃ Ρτ− {+ωρ−.
Ρτ∗υ[−Υθ−.2Σ2+−+%∗∃δΡ∴+,−.σ∀π2∃∋∗ϖ−σ%,Ωδ−.−.ω2{+%)α&−+%∗1
−+ )ψ−Ρς2 Ρτ∗υ[−Υθ−.Χ/&φΡ τ−. )ψ−Ρς2 Ωθ2+)Θ,∴+,−. Ρχ πΧ≤ ∃Υ Ωφ−∀
∃Υ1
91∀ππ∃Υ 1π∃Υ   1≤π∃Υ  1≤Γ∃Υ

(δ∋]2+{+%.&%+%&{+η−Ρ|Ρ+∼,{+ωρ−.Ρτ∗υ[−Υθ−.∋Θ(

3
3 ∀



 

   
,+%&Ω&Ξ∃σ%,Ωδ−.−.ω2{+%)ψυΡ%2θ(
3 ∀ 3 ∀

.&&τ%(
3 ∀ 4

 
∗υτ%(
∀ΧΓ





4
3 ∀
πΧ≤

 
∗υτ%
3



+%υ(
∀ΧΓ 3

 
 σ, ∴ Ρ+∗δ2 ⁄ −− ∋βυ ∴3 )Θ Ρ+%υ )Θ, /&Ξ∗ Ρ+2
4 4
πΧ≤ 
3 ∀ 313 ∀
 #


 !

∀∀

3
3 ∀
3


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   

}
(/Θ&−Θυ−.ωξ&Ρ%ΩΖ2+,Υ♠−Ωδ∋]2+{+%
ωρ−.Ρ−+ω/Θ&Ρτ−Ρ%2θ(
3 ∀ 3 ∀
4 4
∃ ∃ 



 
 

∗υτ%(
3 ∀
4

)ψυ
3 ∀ 31 ∀
3Γ 
πΧ3≤ πΧ3≤

 
 
  

)ψυ
4
πΧ∀Φ  ∀Φ


# #

    

+ΙΠ
(≅δΡ Υθ−.2ρ+2 Ρτ∗υ[− Ρτ,−. ∃δΡ Ρτωξ−. ΩΘ− +γ&15+ωρ−. ΡτΤ−+ σ%, Ωδ−.
2}%−.∗γ−2θσο−.(
4  

 1  #

 

 
 
1−+/ωα2Υθ−.


    


+Ι
≅δΡΥθ−.2ρ+2Ρτ∗υ[−Ρτ,−.∃δΡΡτωξ−.ΩΘ−+γ&15+ωρ−.ΡτΤ−+σ%,Ωδ−.2}%
−.∗γ− 2θ σο−.(
42,Υ  

  #

 







 
1 −+ Ωδ ∋]2+ {+% 2}% σ%, Ωδ−. Ρο& 2−. ∃δΡ
Ω&Ξ∃/βΡ∴εΥ%∗∴+,−.Ρ+ξ&.&%−πΧΓΥ1
91
Φ

 1

∀3  1

   1

3



 


 


 




 
  1 %∗ Ρ+ξ& Ω&Ξ∃ ΡπΧΓΥ Ρ+Τ {+% σ%, Ωδ−. Ρο& ≅ ∋2 −Θυ ∋Θ(
 !

 !

∀3
3
3
 πΧΓ



 


+
(
Ρ+∼,.&Ρ+&φΡΡ+Τ
Γπ 
#


∃Θ)ψ−Ρς2
Γπ
1 Γπ   πΧΓ   ∀Χ≤  

  #  #  ∃# 


     
91
+Ι
τ−∃⊥Ρ−ωα22θ∃δΡ−.∗γ−σ%,Ωδ−.Ρο,τ%Ρο&Ω&Ξ∃:∃δΡσ%,Ωδ−.Ω&[∗+%2θ
Ρη−ΥςΓπ1τ−∃⊥Ρ−ωα2∗βΡ+&]−−+−.)−.Ρτ−Ωγ−.Ρ∃:Χ∃&)−.2Σ2+
−+%∗2∃1ψ−Ρς2Ρτ∗υ[−Υθ−.Ρτ−∃⊥Ρ−ωα2∋Θ(
91∀3π2∃Υ1Φπ2∃Υ1∀Γπ2∃Υ1∀≤π2∃Υ

+
1 } Ζ !∋ ∃! ]{!∋   ∃ ! α !%# χ ∴ !Ωη  γ%# χδ!∋ εθ
 
#


Ωθ
1 1Γπ ∀Γπ  

3 ∀ 3 ∀ 1 31π ∀πΧ31∀π
∀ 
3 3 3
∃ ∃ 
 #

  
   
  
1 }
( .η− −+%∗ −+βΡ −−
Ρτ,−.{+ωρ−.ΡτΤ−+Ρτ−Ρ%∋βυπ





 !

 !

∀
+Α
θ−.Ρτ∗υ[−Ρχ9Ωφ−≅)α&/ωα2Υθ−.
Φπ 
#


≅2Σ2+9∃δΡΩ,ο−σ2∃
1,)α&Υθ−.Ρο&9Ρ+ΤΥθ−.Ρο&≅2θΡ−+2+βΡ−Θ,Υ%∗Ωυ€




 
φ∗Ω&Ξ∃≅−∃Ρτωα2−.∗γ−9

+∼,.&Ρ+&φΡΡ%2θΩδ∋]2+{+%
3 3 1π
Φπ

 
 

   

ψυΥθ−.Ρο&≅Ρτ↔{+%+ρ−Υθ−.Ρο&9∃δΡ∋ω−.∋Θ


∀(+&/&−Ωδ2}%Υθ−.Ρ−..β{Ωϖ&Χ−−.∋ω−.σ,Υθ−.Ρτ∗υ[−Ρ+%υΩ′&/%,−+&∗
∋η−€
91&∃←1&∃↑1+ϖ−.Ρ+%υΩ′&1−.4∋η−
+
−.∋ω−.Υθ−.( 

+6Ι∗/?,<ΕΕ34;=>

5!585 
ζ&Υ|/&Ξ∗Ρ+2Υθ−.Ρο&−.∗γ−:∋Θ(∗
π





δ∋]2+{+%(
}%Ω&Ξ∃≅Υ,)α&−.∗γ−(

3



∀
:



ϑ

8

Ξ

 !

 !

∀4
}%+%&Ω&Ξ∃≅ΧΥ,)α&−.∗γ−(
3 ∀
3
→ →


3∴ζ∀
3


%&Υθ−.)∗ϖ−.{+%(

3
4
∀∴3
3
∀∴3







 +↓(
+&≅Ρτωα2:Ρ+Τ{+ωρ−.ΡτΤ−+Υθ−.Ρο&≅∋Θ(

∗ 912,Υ Ρζ3  2,Υ 3  
  


  
 
  


34πτ%σΥ∴+&ΡπΡ+Τπ

2,Υ

π2,Υ

3


)Τ)°π




3

1ψυΡο&−.∗γ−Ρ%2θ(∗πΧΦ2,Υ34π

Ρζ
3

2∃1ο&≅Ρ%2θ(
 ∗

πΧΦ2,Υ34π

Ρζ
3




)


31
∃1Τ≅Ρτωα2:Ρ+∼,2+&[∗Ρτ∗υ[−Υθ−.−−(


Γ2,Υ4

Ρ
Φ

ζ


13
Γ2,Υ4

Ρ
Φ

ζ


Γ2,Υ4

Ρζ
Φ


)α&/&−Ωδ32∃Χ2+∗∴ε∀ΧΦΥ1%∗ΥΡ+ΤΥθ−.2+∗υΞ−Ωω2∀3∃σ2Ρ+∼,συ1
%−+/ωα2Υθ−.1
 !

 !

∀Γ
/&φΡ{+ωρ−.ΡτΤ−+σ%,Ωδ−.Ρο&∃δΡΩ&Ξ∃2Σ2+Ωη∗9∀ΧΦ∃1+−.ς2Ρ+ξ&.&%−∋29)_
Ρτ/&−σωρ−.1
%#!∋Ξ!
∀ΧΦ∃Χ932∃ΧΡΥΧ∀3∃
%

−+

€
/



€σ

∀ΧΦ∃
Ρ%2θ)

∀3
Ρ


4∃Υ





32,Υ∀Χ3Γ

1Ρ3
4ΧΦ
ΦΧ∀


η
8
Ιχ[2ΙΠ

Λ
3

ν[ν
Ω&[∗∴&]−Ρ


)


ΧΡ


4
ΦΧ∀

τ%σ
∀
 
34π2∃Χ)€
3
 

€ΧΡ∀Υ

 
3
€Χ3∀π2∃
4

∗2∃Χ∗
Ρ∀3
€

∀%2θ(

333






 

ΦΥ

Ρ
π
ζ∀ζ

″




3







≥


1Ρ
π
ζ∀ζ




Ρ
π
ζ

4∗2∃Χ∗
Ρ∀3
€Ρ−1

−
Φ
∀3



3σΩ
ψυΥ%∗−3σΩΩ&Ξ∃−ΘυΥ♦Ρτο−.Ρ+Σ&−+ωΡ+ξ&Ω&Ξ∃ΡΧ−.+%∋Θ∋ο&2θ∗2∃1

+Π
≅δΡ∗2η∗−+Ψ.−)Θ,∃Ρ+,%σ%,Ωδ−.)α&Ρη−Υς∀3π1+,∗2η∗2+ο∃
−+♥)Θ,∃⊥Ρ−ωα2−.ωξ&Ρ%Ρ+βυ2θ∃δΡ+]Υθ−.Ρτ−∋%−Ρ,τ%%∃ΘΡ∃Ω&Ξ∃2+ο∃:2}%
∗2η∗)α&∃⊥Ρ−ωα21+,/&−ΩδΥθ−.∋Θ9πΧΓ2∃)Θ∴+ϖ−.Ω′&1
%−+)ψ−Ρς2Ρτ∗υ[−Υθ−.Ρτ−∃⊥Ρ−ωα21&φΡτ−.∴+,−.2Σ2+.&%∀π.−∋γ&∋&−Ρ&φ{∋Θ
∋4ΧΓ2∃1
/&φΡ{+ωρ−.ΡτΤ−+σ%,Ωδ−.2}%Ω&Ξ∃≅Ρτ−∃⊥Ρ−ωα22Σ2+:∃δΡΩ,ο−∀32∃+,
σ%,Ωδ−.Υθ−.Ρο&:2θ/&Ξ∗Ρ+2∗:92,Υ

1Ρ1
2−+∴+,−.2Σ2+.&%+%&Ω&Ξ∃Ρτ−∃⊥Ρ−ωα2σ%,Ωδ−.2−.{+%Χ−.ω2{+%Χ)∗ϖ−.{+%1
τ−2−.Ωωξ−.Ρ+♣−.∗%:1
%#!∋Ξ!∋ΖϖΖ
%2θ∀3πΧ9πΧΓ2∃
%

)€Χ&φΡτ−.∴+,−.2Σ2+.&%υ∀π.−∋γ&∋&−Ρ&φ{∋Θ∋4ΧΓ2∃1


πΧΓ2∃




1

πΧΓ1∀3π
χ

/&Ξ∗Ρ+2Υθ−.Ρο&:(∗
:
92,Υ

1ΡπΧΓ2,Υ34π

1Ρ2∃
&Ξ∗Ρ+2Υθ−.Ρο&≅2Σ2+:∃δΡΩ,ο−∀32∃1
 ∗

92,Υ

1Ρ3




πΧΓ12,Υ34π


∴3




∴1

πΧΓ1∴2∃)α&∴


ψυ+%&Ω&Ξ∃σ%,Ωδ−.2−.{+%Χ∴+,−.2Σ2+.&%2+−./−.∃δΡΥς−.∗υ−∋η−
/ωα2Υθ−.1
%&Υθ−.−.ω2{+%(

3



∀∴3




3∴ζ∀
3

∴ζ
3




3∴ζ∀πΧ∀3Γ13∴ζ∀2∃)α&∴


%&Ω&Ξ∃σ%,Ωδ−.)∗ϖ−.{+%2θ∴+,−.2Σ2+/−.∃δΡΥς∋×∋η−∃δΡ{+η−Ρω/ωα2
Υθ−.
+
≅δΡΥ&συΩΘ−+γ&−∃−.%−.2θΩ&Ξ∃Ωη∗:σ%,Ωδ−.Ρ+∼,{+ωρ−.Ω−.)α&/&−
Ωδ9Γ2∃ΧπΧΓΥ1ψ−Ρς2Ρτ∗υ[−Υθ−.∋Θ4π2∃Υ1&φΡ{+ωρ−.ΡτΤ−+Υθ−.Ρο&≅2Σ2+:
σΓπ2∃1
91
Γ2,Υ4 Γ  

  #
 
 
  
Γ2,Υ4 3ΧΓ  

  #
 
 
 
1
Γ2,Υ4  

  #
 
 
   



1
5+ωρ−.ΡτΤ−+σ%,Ωδ−.Ρ%&≅(
3
2,Υ 


 Ω 



 

τ,−.Ωθ(


   
   
σΓπ2∃
Γ2,Υ4 Γ  

  #
 
 



1η 
≅δΡ −.ωξ& ∗%− ΥΣΡ ∃δΡ 2+&φ2 {+%, Ρτ− ∃⊥Ρ/&Ξ−Χ Ρ+βυ−θ −+ϖ 2%, ∀π ∋η− Ρτ,−.

τ%σ
3

1  1
τ%σ


1
1ηΠ
≅δΡΥθ−.2θΡη−ΥςΓππ2θΡς2Ωδ∋%−Ρτ∗υ[−Γπ∃Υ1%&Ω&Ξ∃.η−−+βΡΡτ−2−.
{+ωρ−.Ρτ∗υ[−Υθ−.{+&2Σ2+−+%∗∃δΡ∴+,−.∋Θ/%,−+&∗ΩΞ.&%2+−.2θΩδ∋]2+{+%
/−.

τ%σ1

91∀∀ΧΦ2∃1  14ιΧΦ2∃1  13Χ2∃1  14Χ3≤Γ∃1
1η
.ωξ&Ρ%Ω⊥Ρ2+Τ∃Ρτ,−.−ωα2∃δΡ−.∗γ−∃2θΡη−Υςι3Γ)ΘΡς2ΩδΡτ∗υ[−∃
Ρτ,−. −ωα2 ∋Θ ∀4Γπ∃Υ1 +,−. 2Σ2+ .&% +%& Ω&Ξ∃ .η− −+%∗ −+βΡ Ρτ,−. −ωα2 σ%, Ωδ−.
−.ω2{+%∋Θ

91πΧ3Γ∃1  1∀∃1  1πΧΓ∃1  1∀2∃1
1η
ο&Ω&Ξ∃Ρτ−∃⊥Ρ−ωα2υ−Ρ−+2θ−.∗γ−σ%,Ωδ−.Ω&[∗+,Θ2−.{+ωρ−.Ρ+♣−.
Ω−.)α&Ρη−ΥςΓπ1+&ΩθΡτ−∃⊥Ρ−ωα2+Τ−+Ρ+Θ−++%&Υθ−.Ρτ−Ωγ−.Ρ,1ο&+%&
Ω&Ξ∃≅Χ 2Σ2+−+%∗2∃Ρτ−Ωωξ−.Ρ+♣−.Ω−.Ω&∗%∋∗ϖ− σ%,Ωδ−. 2−.{+% )α&
 !

 !





∀∴3σ
1 1


∴σ
1
1η
≅δΡΥθ−.∃Ωω2∃ϖΡ/&{+ωρ−.ΡτΤ−+υ92,Υ3






Ρ
1ς2Ωδ22Ωο&2}%
{+−Ρ|∃ϖ&Ρτωξ−./−.4∋η−Ρς2ΩδΡτ∗υ[−Υθ−.∴+&
 91

4

91 1



931 1



1∗

Γ2,ΥΓ

Ρ

42∃1  1∗

Γ2,ΥΓ

Ρζ

42∃1
1ηΙ
θ−.2ρ∋%−Ρτ∗υ[−Ρχ−.∗γ−:σ2Ρ+∼,∃δΡΩωξ−.Ρ+♣−.)α&/&−Ωδ∴+ϖ−.Ω′&1∝
Ρ+ξ&Ω&Ξ∃ΡπΧΡο&:2θ{+ωρ−.ΡτΤ−+(
Ρ2,Υ9∗
:


2∃1≅δΡΩ&Ξ∃2Σ2+−.∗γ−∃δΡ∴+,−.
/−.∀3/ωα2Υθ−.2θ∋&ΩδΓ2∃Ρ+ξ&Ω&Ξ∃/−.∀32+∗∴Τ1&−Ωδ2}%Υθ−.∋Θ(
 91Γ2∃1  13ΧΓ2∃1  1Γ
3
2∃1  1∀π2∃1
1ηΑ
≅δΡ∃&−+−2+ο∃−+♥)Θ,∃⊥Ρ−ωα2σ%,Ωδ−.Ω&[∗+,Θ)α&Ρη−Υς4π1
.ωξ&Ρ%Ρ+βυτ−.+%&Ω&Ξ∃9)ΘΡτ−∃⊥Ρ−ωα22−.−∃Ρτ−{+ωρ−.Ρτ∗υ[−Υθ−.2Σ2+
−+%∗∃δΡ∴+,−.σ3π2∃∋∗ϖ−σ%,Ωδ−.−.ω2{+%−+%∗1&φΡΡς2ΩδΡτ∗υ[−Υθ−.−∃

3

1  1
τ%σ
Γ
4

1  1
τ%σ
4
Γ

1
 !

 !

∀
1η
θ−.∃2θΡη−Υς4Γπ∋%−Ρτ∗υ[−)α&Ρς2ΩδΦπ∃ΥΡτ,−.∴+ϖ−.∴+1&%+%&
Ω&Ξ∃2Σ2+−+%∗∀∃Ρτ−2−.{+ωρ−.Ρτ∗υ[−Ρ+Τ2+−.σ%,Ωδ−.

912−.{+%1 1)∗ϖ−.{+%1 1−.ω2{+%1 1∋]2+{+%

41
1η
≅δΡΥθ−.2ρ+22θΡη−Υςσ%,Ωδ−.∋Θ4ππΧ∋%−Ρτ∗υ[−Ρτ,−.∴+ϖ−.∴+)α&Ρς2
Ωδ∋Θ3ππ∃Υ1%&Ω&Ξ∃≅Χ2Σ2+−.∗γ−∃∋η−∋ωΡ∋Θσ

4Γ2∃)Θσ


Γ∃1+,−.2Σ2+.&%+%&
Ω&Ξ∃.η−−+%∗−+βΡΡτ−2−.{+ωρ−.Ρτ∗υ[−Υθ−.σ%,Ωδ−.∋]2+{+%−+%∗π
π
∋Θ

91Γ∃1  13ΧΓ∃1  1∀Χ3Γ∃1  1ΧιΓ∃1
1ηΙ∆
≅δΡσυΩΘ−+γ&σΘ&2θΩη∗9σ%,Ωδ−.)α&Ρη−Υς)ΘΡ+∼,{+ωρ−.)∗ϖ−..θ2)α&
συΧΡς2ΩδΡτ∗υ[−Υθ−.Ρτ−συ∋Θ4∃Υ1ΗϒΡΩ&Ξ∃≅Ρτ−συ)Θ2Σ2+9∃δΡΩ,ο−3≤2∃Χ
−.ωξ&Ρ%Ρ+βυ≅∋∗ϖ−σ%,Ωδ−.∋]2+{+%)α&9∃δΡ.θ2


∴

ζ

3)α&∴πΧ

∀Χ∂&φΡ
Ρη−ΥςΡτ,−.∴+,−.Ρχ33Ωφ−3Φ1ωα2Υθ−.

/−.

913π2∃1  13Γ2∃1  14π2∃1  1∀Φ2∃1
1ηΙΠ
&Υ|Ρο&−.∗γ−:2θΥθ−.σ%,Ωδ−.Ρ+∼,{+ωρ−.ΡτΤ−+(
Ρ2,Υ9∗
:


σ
3Ρ2,Υ9∗



1
1η Ι
≅δΡ Υθ−. 2ρ +2 ∋%− Ρτ∗υ[− Ρτ− ∃δΡ {+ωρ−. Ρτ∗υ[− Υθ−. )α& Ρς2 Ωδ 4π2∃Υ1
5+ωρ−.ΡτΤ−+Υθ−. 2}%∃δΡΩ&Ξ∃: Ρτ−{+ωρ−.Ρτ∗υ[−Ωθ ∋Θ∗
:
32,Υ3

Ρ2∃15+ωρ−.
ΡτΤ−+Υθ−.Ρο&∃δΡΩ&Ξ∃−∃Ρτωα2:)Θ2Σ2+:∃δΡΩ,ο−∀π2∃∋Θ

91∗

32,Υ3

Ρζ

32∃1  1∗

32,Υ3

Ρ

32∃1

1∗


15+ωρ−.ΡτΤ−+−Θυ/&Ξ∗σ&↔−
 91∃δΡΥθ−.2+ουΡ+∼,2+&[∗∃2}%Ρτ2)α&Ρς2ΩδπΧ∀Γ∃Υ1
 1∃δΡΥθ−.2+ουΡ+∼,2+&[∗σωρ−.2}%Ρτ2)α&Ρς2ΩδπΧ3∃Υ1
 1∃δΡΥθ−.2+ουΡ+∼,2+&[∗σωρ−.2}%Ρτ2)α&Ρς2ΩδπΧ∀Γ∃Υ1
 1∃δΡΥθ−.2+ουΡ+∼,2+&[∗∃2}%Ρτ2)α&Ρς2Ωδ∀ιΧΓ∃Υ1
 !

 !


1η Ι
≅δΡ −.∗γ− Υθ−. 2ρ σ%, Ωδ−. Ω&[∗ +,Θ Ρ+∼, {+ωρ−. ΡτΤ−+( ∗  92,ΥΓ

Ρ ζ

32∃1τ,−.ΩθΡΩ,/−..&υ1+,−.2Σ2+.&%+%&Ω&Ξ∃.η−−+%∗−+βΡΡτ−{+ωρ−.
Ρτ∗υ[−Υθ−.∃Θ{+%σ%,Ωδ−.∋]2+−+%∗

3∋ΘπΧιΓ∃1ωα2Υθ−.)ΘΡς2ΩδΡτ∗υ[−Υθ−.∋η−
∋ωΡ∋Θ(

91∀Χπ∃3ΧΓ∃Υ1 1∀ΧΓ∃ΓΧπ∃Υ1 13ΧΓ∃∀Χπ∃Υ1 1πΧιΓ∃∀ΧΓ∃Υ1
1ηΑ
≅δΡΥθ−.2ρΧ)α&{+ωρ−.ΡτΤ−+∗π2,Υ41∀π

ΡΓπ2∃ΧΡτ∗υ[−σ2Ρ+∼,Ρτ2
:ΧΡτ,−.ΩθΡ,οΩδΩ,/−.∃ϒΡ∃ΧΡ+ξ&.&%−ΡΩ,/−..&υΥ1ς2ΩδΡτ∗υ[−Υθ−./−.
 91Γπ∃Υ1 
1≤π∃Υ1  1∀ππ∃Υ1  1∀3Γ∃Υ1

1 1
3
∀∴3σ


1 1



∀∴3σ
1 1


∴σ
1

1ηΑ∆
θ−.2ρ∋Θ
 91ΥΡτ∗υ[−2+∗υΞ−Ωδ−.2ρΡτ,−.∴+ϖ−.∴+1
 1−+−.σ%,Ωδ−.2ρ∋%−Ρτ∗υ[−Ρτ,−.∃ϖ&Ρτωξ−.1
 12+∗υΞ−Ωδ−.Ρωρ−.Ως&2}%)ψΡ−ΘυΥ,)α&)ψΡ∴+Σ21
 1Υ2,σΖ−Ρ∗η−+,Θ−.&%2Σ2{+η−Ρ|2}%∃ϖ&Ρτωξ−.1
1ηΑΠ
ς2ΩδΡτ∗υ[−Υθ−.Ρτ,−.∃δΡ∃ϖ&Ρτωξ−.
91

{+Ρ+∗δ2)Θ,/−2+βΡ∃ϖ&Ρτωξ−.)ΘΡη−ΥςΥθ−.1
1

{+Ρ+∗δ2)Θ,/−2+βΡ∃ϖ&Ρτωξ−.)Θ/&−ΩδΥθ−.1

]!∋
1Ξ{+−∋,ο&Υθ−.−.%−.+%υΥθ−.σ2−.ωξ&Ρ%σ%)Θ,(
 91Ρς2ΩδΡτ∗υ[−Υθ−.)Θ/ωα2Υθ−.1
 !

 !

3∀
 1{+ωρ−.Ρτ∗υ[−Υθ−.)ΘΡη−ΥςΥθ−.1
 1{+ωρ−.Ρτ∗υ[−Υθ−.)ΘΡς2ΩδΡτ∗υ[−Υθ−.1

1{+ωρ−.σ%,Ωδ−.)Θ{+ωρ−.Ρτ∗υ[−Υθ−.1
1ηΑ
+−2∃ΡχΡ+2++{−+βΡΩ&[−)Θ,2+Ρτς−.1+&Υθ−.2ρΡτ∗υ[−2Θ−.%−.∗γ−
Ρ+Τ∂∂2Θ−..&∃1
 91/&−ΩδΥθ−.1     1Ρη−ΥςΥθ−.1
 1/ωα2Υθ−.1    
1/&−Ωδ)Θ−−.∋ω−.Υθ−.1
1η∆
+−2∗Ρτ∋ξ&
1
1−.∋ω−.2}%Υθ−.Ρτ∗υ[−Ρχ∃δΡ−.∗γ−Ω&Ξ∃Υ♦(
 91.&∃Ρ∋])α&/Τ−+{+ωρ−.∗Ζ−.Ωωξ−.Ρτ∗υ[−Υθ−.Χ∴+&Ρτ∗υ[−Ρτ,−.∴+ϖ−..&%−1

1.&∃Ρ∋])α&∗Ζ−.Ωωξ−.Ρτ∗υ[−Υθ−.Χ∴+&∃ϖ&Ρτωξ−.Ρτ∗υ[−∋Θ∃δΡΩωξ−.Ρ+♣−.1
 1.&∃Ρ∋])α&∗Ζ−.Ωωξ−.Ρτ∗υ[−Υθ−.Χ∴+&Ρτ∗υ[−Ρτ−∃⊥ΡΡ+,Σ−.2}%2+βΡ∋Ψ−.1
 1∋∗ϖ−∴+ϖ−.Ω′&∴+&∃ϖ&Ρτωξ−.Ρτ∗υ[−Υθ−.∋Θ∃δΡΩωξ−.Ρ+♣−.1
1η∆
+−2∗Ρτ∋ξ&
]!∋

=Ε%Ε1
11111111111111111τωξ−.(5111111111111111111111111111111111111111111111111111


 !∀#∃%%&∋
&%,Ρ+,%2}%+%&Υθ−.{+ΣΡτ%Ρχ+%&−.∗γ−Υθ−.∴φΡ+{

Χ
3
2Σ2+−+%∗∃δΡ∴+,−.4(
ΗϒΡΩ&Ξ∃≅2Σ2++%&−.∗γ−∋η−∋ωΡσ

Χσ
3

1:;Ι∗ϑϑ=>1<




=

=
Ι

 !

 !

33

  

  

5+ωρ−.ΡτΤ−+.&%,Ρ+,%Υθ−.Ρο&≅(

Λ

∴


∀ 3 ∀ 3 ∀ 3
3 ,Υ ,Υ 3
3 3

   
 Ω  
 

  
 
  
   
   
   
   

&−Ωδσ%,Ωδ−.Ρο&≅(
∀ 3
3 ,Υ

∴ ⁄
3 3 3 3
4 4

 
   
 
      

=ΠΚΗΘΡ
∀ 3
π
  
   
Σ
&Ξ∃σ%,Ωδ−.22Ωο&(σ
∀
σ
3
∴

∴

⁄
ςΩωξ−.+,⊥2ΥςΩ&Ξ∃∃− Γ ](
4 4

 



∴

⁄
ςΩωξ−.+,⊥2ΥςΩ&Ξ∃22Ωο&∃− Γ ](
∀ ∀
3 3
4 4

 
  

&Ξ∃σ%,Ωδ−.22Ρ&Ξ∗∴+ϖ−.σ%,Ωδ−.(σ
∀
σ
3
∴

∴

⁄
ςΩωξ−.+,⊥2ΥςΩ&Ξ∃22Ρ&Ξ∗∃− Γ ](
4 4

 


:;<
α&/Θ&Ρ,Σ−ΡΤ∃ΥςΩωξ−.σ%,Ωδ−.22Ωο&)Θ∴+ϖ−.σ%,Ωδ−..&%+%&Ω&Ξ∃≅Χ
2Σ2++%&−.∗γ−∋η−∋ωΡ∋Θσ
∀≅


1
 ζ%&−.∗γ−σ%,Ωδ−.2−.{+%(
!
2Ωο&(

σ

°∴

°

σ


!
2Ρ&Ξ∗(

σ

°∴ζπΧΓ

°

σ


ζ%&−.∗γ−σ%,Ωδ−.−.ω2{+%(
!
2Ωο&(

 !

3
ΗϒΡ+%&σ%,Ωδ−.

•
3
Ρο&Ωθ{+ΣΡτ%+%&Υθ−.∴φΡ +{
2−.{+%

•
3
∋Θ+%&−.∗γ−∴φΡ+{1
& Υ| {+ωρ−. ΡτΤ−+ Υθ−. Ρο& −.∗γ−(
3∀

∗∗



92,Υ

Ρ
5+ωρ−.ΡτΤ−+Υθ−.Ρο&≅σ,

Ρτ∗υ[−Ωφ−(

∗ 92,Υ

Ρ


3
∗ 92,Υ

Ρ

3


92,Υ

Ρ


3


92,Υ










3
σ113

3

ψυ ∗

  92,Υ

Ρ 

σ113



 ζ 92,Υ

Ρ 

σ113
3


  9±2,Υ 

Ρ 

σ113



ζ 2,Υ


3

  Ω
 


  

 ζ5+%/%−Ωη∗Ρο&≅(
∀ 3
 
  

 




%+−.Ω&Ξ∃2θ/&−Ωδ22Ωο&
(
9
∃%
39



σ
∀3
 
∴

3

ν

[ΙςΡν
3


)α&∴
Χ11113Χ∀Χπ




1Ζξη∋ΖΩΩ!_Ζ∴]ΖξδΖλη]%&!∋]ΖβΩΩΖχδ!∋#Ζ]δγ!∋κ
χφ!Ω!∋ηθ !ϕ!γ%#χδ!∋
1}


φ∗{+ωρ−.ΡτΤ−+Υθ−.Ρο&≅σ,:Ρτ∗υ[−Ωφ−∋Θ(
2,Υ 3  

 
 Ω



 
)α&σ≅:
Ρ+Τ5+ωρ−.ΡτΤ−+Υθ−.{+−οΡο&≅∋Θ(



&−Ωδσ%,Ωδ−.2}%Ω&Ξ∃≅(9

39

2,Υ
∀ 3
3
 









∀

3
σ
3
σ
∀


 !



     


5+ωρ−.ΡτΤ−+Υθ−.Ρο&≅σ,Ρτ∗υ[−Ωφ−(
3
≅
3 σ 3
∗ 32,Υ∀π Ρ  32,Υ∀π Ρ 2∃



     


5+ωρ−.ΡτΤ−+Υθ−.Ρο&≅∋Θ(


 
9≅

ζ
≅


32,Υ∀π Ρ 
3

 
ζ

 #


5+%/%−Ωη∗2}%Υθ−.Ρο&
 3 ∀
ι
σ σ  Φπ 4Γ τ%σ
Φπ 4
  
        

&Ξ∃≅2+ψ∃{+%+ρ−
+%&−.∗γ−∃δΡ.θ2
ι
τ%σ
∀3


+Ι
1τ,−.Ρ+−.+&]∃.&%,Ρ+,%Υθ−.−.ωξ&Ρ%Ρο,τ%Ρτ−∃⊥Ρ−ωα23−.∗γ−Υθ−.9Χσ%,
Ωδ−.)α&{+ωρ−.ΡτΤ−+∗
9
∗

Γ2,Υ∀π

Ρ2∃1ψ−Ρς2Υθ−.∋Θ3π2∃Υ1,&/&−ΩδΥθ−.
∴+ϖ−.Ω′&1&φΡ{+ωρ−.ΡτΤ−+σ%,Ωδ−.Ρο&Ω&Ξ∃≅2Σ2+9Χ∋η−∋ωΡιΧ32∃)Θ≤Χ32∃1
+
%2θ(



∗

Γ
3
2,Υ∀π

ΡζπΧ∀Γ

2∃1


(∗Θ(∗1:ϑ?Β8Ε∗ϑϑ=>
??
ΩΖ!∋η{!ϑ2(ΞΩ]κ!∋ζ!∋Ω
χ{+ωρ−.ΡτΤ−+.&%,Ρ+,%Υθ−.(
3 ∀ ∀ 3
  
3 1 1 1

   
[ Ω 1 1 
 

 
 
   
 
   





#   #  



&−ΩδΩοΡ.&ΣΡτ_22Ρ&Ξ∗
3 ∀
3 ∀
 
3 ∀
3
π



 
1 1   ∃




#  #   

1}
φ∗:∋ΘΡτ∗−.Ω&Ξ∃2}%Ω,ο−9Ρ+ΤΡο&π+,⊥22Σ2Ω&Ξ∃−∃Ρτ−Ωωξ−.Ρτ∗−.Ρτ2
2}%Ω,ο−9ΧΥ♦σ%,Ωδ−.)α&/&−Ωδ22Ωο&)Θ/−.(
3



)Τ∋2−Θυ
∀ 3
 



ΙΩΖ!∋η{!ϑ2(ΞΩ]κ!∋η!∋Ω

%−+ψ−Ρ+βυ/&−Ωδ.&%,Ωδ−.Ρ′−.+{∋Θ(
3 ∀
 
3 1 2,Υ
4

 
Ω Ω




 

1}
φ∗:∋ΘΡτ∗−.Ω&Ξ∃2}%Ω,ο−9Ρ+ΤΡο&π+,⊥22Σ2Ω&Ξ∃−∃Ρτ−Ωωξ−.Ρτ∗−.Ρτ2
2}%Ω,ο−9ΧΥ♦σ%,Ωδ−.)α&/&−Ωδ(
3

Ω Ω

Θ&.&&(
+∼,.&Ρ+&φΡ−+Τ−)Θ,{+ωρ−.ΡτΤ−+Υθ−.Ρ%Ρ+βυ+%&−.∗γ−σ%,Ωδ−.−.ω2{+%−−Ρο&:
∋ΘΡτ∗−.Ω&Ξ∃2}%9Υ♦σ%,Ωδ−.)α&/&−Ωδ22Ρ&Ξ∗
π





+Ι
 τ− ∃⊥Ρ −ωα2 2θ +%& −.∗γ− 9Χ  σ%, Ωδ−. ∋η− ∋ωΡ Ρ+∼, {+ωρ−.
ΡτΤ−+
1   
3

[  1  #


 
)Θ
1   

[  1  #
 
 
1,& )ψ− Ρς2 )Θ/&− ΩδΥθ−.∴+ϖ−.Ω′&
Ρτ,−.∗ΣΡτΤ−+Ρτ∗υ[−Υθ−.1Σ2Ω&Ξ∃Ρ+∗δ2∃⊥Ρ−ωα2−∃Ρτ−Ωωξ−.Ρτ∗−.Ρτ22}%Ω,ο−
9Υ♦σ%,Ωδ−.)α&/&−Ωδ(
91
3


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