Dev Sinha's user avatar
Dev Sinha's user avatar
Dev Sinha's user avatar
Dev Sinha
  • Member for 14 years
  • Last seen more than a month ago
54 votes

understanding Steenrod squares

40 votes

Why does one think to Steenrod squares and powers?

34 votes

How do you approach your child's math education?

33 votes

"Why the heck are the homotopy groups of the sphere so damn complicated?"

24 votes

Intuitive explanation for the Atiyah-Singer index theorem

22 votes
Accepted

Advantages of working with CW complexes/spaces over Kan complexes/simplicial sets?

19 votes

Modern survey of unstable homotopy groups?

16 votes

How to get product on cohomology using the K(G, n)?

16 votes

References for homotopy colimit

15 votes

How can I visualize the nontrivial element of $\pi_4(S^3)$ and $\pi_5(S^3)$ ?

15 votes

What is the intuition for higher homotopy groups not vanishing?

13 votes

What would be the ramifications of homotopy theory being as easy as homology theory?

12 votes

Detailed proof of cup product equivalent to intersection

12 votes

Construction of the Stiefel-Whitney and Chern Classes

12 votes

Homotopy commutativity of the cup product

12 votes

Why aren't there more classifying spaces in number theory?

11 votes

Understanding iterated integrals

11 votes

Mathematicians with both “very abstract” and “very applied” achievements

10 votes

What is the difference between homology and cohomology?

10 votes

Spectral sequences: opening the black box slowly with an example

9 votes

How should one think about pushforward in cohomology?

9 votes

how do you visualize characteristic class?

8 votes
Accepted

Characteristic classes of symmetric group $S_4$

8 votes

Essential theorems in group (co)homology

7 votes

Is there any analogs of Vassiliev invariants in higher dimensions?

7 votes

Examples of advance via good definitions

7 votes

What would you want to see at the Museum of Mathematics?

7 votes

What would you want to see at the Museum of Mathematics?

7 votes

$\pi_4$ of simply-connected 4-manifold

7 votes

Rational homotopy groups of $S^2\vee S^2$