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Mathematical Sciences Classification System

55Qxx - Homotopy groups

• 55Q05
  Homotopy groups, general; sets of homotopy classes
• 55Q07
  Shape groups
• 55Q10
  Stable homotopy groups
• 2
  55Q15
  Whitehead products and generalizations
• 55Q20
  Homotopy groups of wedges, joins, and simple spaces
• 1
  55Q25
  Hopf invariants
• 55Q35
  Operations in homotopy groups
• 1
  55Q40
  Homotopy groups of spheres
• 1
  55Q45
  Stable homotopy of spheres
• 55Q50
  $J$-morphism [See also 19L20]
• 55Q51
  $v_n$-periodicity
• 1
  55Q52
  Homotopy groups of special spaces
• 55Q55
  Cohomotopy groups
• 55Q70
  Homotopy groups of special types [See also 55N05, 55N07]
• 55Q91
  Equivariant homotopy groups [See also 19L47]
• 55Q99
  None of the above, but in this section