Reputation
Next tag badge:
1162/1000 score
198/200 answers
Badges
16 367 674
Newest
 Nice Answer
Impact
~2.8m people reached

4h
comment The difference between percentages from two different samples.
It really depends on your sample size and representativeness. If those are low enough then you really can't say anything.
4h
answered Innocent-looking Diophantine equation with smallest solution of the order $10^{50}$?
4h
answered Is it possible to give the unit square a smooth structure?
17h
comment Solvable equivalent to nilpotency of first derived Lie algebra?
@WetSavanna: second edition.
18h
revised Solvable equivalent to nilpotency of first derived Lie algebra?
added 173 characters in body
18h
comment Solvable equivalent to nilpotency of first derived Lie algebra?
For example, it is Proposition 1.39 in Knapp's Lie Groups Beyond an Introduction (although I don't know what book of Knapp's the OP has in mind).
18h
answered Solvable equivalent to nilpotency of first derived Lie algebra?
19h
awarded  Nice Answer
19h
revised Is there an analogue of Eilenberg-Maclane spaces for homology?
added 321 characters in body
1d
comment Is this Bertrand's postulate-related statement valid?
In fact the prime number theorem implies that for any $\varepsilon > 0$ and sufficiently large $n$, there is a prime between $n$ and $(1 + \varepsilon) n$. For stronger results than this see en.wikipedia.org/wiki/Legendre%27s_conjecture.
1d
revised Is there an analogue of Eilenberg-Maclane spaces for homology?
added 118 characters in body
1d
revised Is there an analogue of Eilenberg-Maclane spaces for homology?
deleted 46 characters in body
1d
revised Is there an analogue of Eilenberg-Maclane spaces for homology?
deleted 17 characters in body
1d
revised Is there an analogue of Eilenberg-Maclane spaces for homology?
added 300 characters in body
1d
comment Why is the cartesian product so categorically robust?
That's fair. And it is worth noticing that there isn't an obvious analogue of representability which ensures that a functor $C \to \text{Set}$ preserves colimits.
1d
revised Why is the cartesian product so categorically robust?
added 21 characters in body
1d
answered Why is the cartesian product so categorically robust?
1d
comment Why is the cartesian product so categorically robust?
If $C$ has coproducts (which is true in all of the OP's examples) then the forgetful functor being representable is equivalent to it having a left adjoint.
1d
answered Is there an analogue of Eilenberg-Maclane spaces for homology?
1d
answered Cohomology of wedge equals direct sum of cohomologies