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  1. Homotopy groups O(N) and SO(N): $\\pi_m(O(N))$ v.s. $\\pi_m(SO(N))$

    Oct 3, 2017 · I have known the data of $\\pi_m(SO(N))$ from this Table: $$\\overset{\\displaystyle\\qquad\\qquad\\qquad\\qquad\\qquad\\qquad\\quad\\textbf{Homotopy …

  2. Dimension of SO (n) and its generators - Mathematics Stack Exchange

    Nov 18, 2015 · The generators of $SO(n)$ are pure imaginary antisymmetric $n \\times n$ matrices. How can this fact be used to show that the dimension of $SO(n)$ is $\\frac{n(n-1 ...

  3. Prove that the manifold $SO (n)$ is connected

    The question really is that simple: Prove that the manifold $SO (n) \subset GL (n, \mathbb {R})$ is connected. it is very easy to see that the elements of $SO (n ...

  4. Fundamental group of the special orthogonal group SO(n)

    Also, if I'm not mistaken, Steenrod gives a more direct argument in "Topology of Fibre Bundles," but he might be using the long exact sequence of a fibration (which you mentioned).

  5. Diophantus Epitaph Riddle - Mathematics Stack Exchange

    Aug 19, 2025 · Diophantus' childhood ended at $14$, he grew a beard at $21$, married at $33$, and had a son at $38$. Diophantus' son died at $42$, when Diophantus himself was $80$, and so …

  6. orthogonal matrices - Irreducible representations of $SO (N ...

    Sep 21, 2020 · I'm looking for a reference/proof where I can understand the irreps of $SO(N)$. I'm particularly interested in the case when $N=2M$ is even, and I'm really only ...

  7. Mathematical Fallacy - The $17$ camels Problem.

    Jul 29, 2020 · So the Problem goes like this :- An old man had $17$ camels . He had $3$ sons and the man had decided to give each son a property with his camels. Unfortunately however, the man dies, …

  8. Is $SO (n)$ actuallly the same as $O (n)$? - Mathematics Stack Exchange

    May 23, 2016 · $SO(n)$ is defined to be a subgroup of $O(n)$ whose determinant is equal to 1. In fact, the orthogonality of the elements of $O(n)$ demands that all of its members to ...

  9. Distinguishing $SU(n)$ from $SO(n)$ - Mathematics Stack Exchange

    May 24, 2017 · Suppose that I have a group $G$ that is either $SU(n)$ (special unitary group) or $SO(n)$ (special orthogonal group) for some $n$ that I don't know. Which "questions ...

  10. Representation theory of $SO (n)$ - Mathematics Stack Exchange

    Regarding the downvote: I am really sorry if this answer sounds too harsh, but math.SE is not the correct place to ask this kind of questions which amounts to «please explain the represnetation …