Báo cáo toán học: "On the smoothness of sphere extensions " - Pdf 20

class="bi x0 y0 w1 h1"
class="bi x1 y0 w2 h1"
class="bi x1 y1 w3 h2"
class="bi x1 y2 w2 h3"
class="bi x1 y2 w2 h3"
class="bi x1 y2 w3 h3"
class="bi x1 y1 w3 h2"
class="bi x1 y2 w2 h3"
class="bi x1 y3 w4 h4"
class="bi x1 y0 w2 h1"
class="bi x1 y1 w2 h2"