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seen Jun 27 at 20:22

Sep
30
awarded  Explainer
Jun
14
awarded  Yearling
Nov
12
awarded  Nice Question
Nov
6
awarded  Popular Question
Oct
15
awarded  Nice Question
Jun
14
awarded  Yearling
Jan
13
revised Does there exist a differentiable function $\Bbb R^2$ to $\Bbb R$ with certain partial derivative properties?
added 29 characters in body
Jan
13
answered Does there exist a differentiable function $\Bbb R^2$ to $\Bbb R$ with certain partial derivative properties?
Sep
5
revised Functional equation of elliptic function with exactly two poles of order one
added 25 characters in body
Sep
5
answered Functional equation of elliptic function with exactly two poles of order one
Aug
19
answered Writing down an explicit homotopy
Aug
16
awarded  Critic
Aug
16
comment $f'+\lambda f$ acts as $f'$ without integral
@FrankScience ams.org/journals/proc/1976-060-01/S0002-9939-1976-0417350-1/… seems to prove that an arbitrary sum of a Darboux and continuous function can fail IVP pretty bad.
Aug
16
comment $f'+\lambda f$ acts as $f'$ without integral
@AndréNicolas That's not true, every function on the reals is the sum of two with IVP (c.f. the Wiki page for Darboux's Theorem).
Jul
20
answered Proving a number with $3^n$ equal digits is divisible by $3^n$
Jul
14
answered Why is the inradius of any triangle at most half its circumradius?
Jun
14
awarded  Yearling
Apr
18
answered Why this element in this tensor product is not zero?
Apr
13
revised What geometrical obstructions to $M$ being flat do elements which map to 0 in $M \otimes I$ represent?
added 336 characters in body
Apr
12
asked What geometrical obstructions to $M$ being flat do elements which map to 0 in $M \otimes I$ represent?