bio | website | TheBigQuestions.com/blog |
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location | ||
age | ||
visits | member for | 3 years, 5 months |
seen | 7 mins ago | |
stats | profile views | 6,903 |
Apr 13 |
comment |
computing integral of dz/(z+1) on unit circle
Please do not answer off topic questions. |
Apr 12 |
awarded | Civic Duty |
Apr 9 |
comment |
coin reversal puzzle with one hand and two stacks
It would be really good to reword this so that it does not appear at first glance like the answer might depend on your manual dexterity. |
Apr 2 |
comment |
Non-cohomological proof that a noetherian scheme $X$ is affine if its reduction $X_{red}$ is affine
The argument given in the comment to the linked question seems to answer this. The only cohomology group invoked is an $H^1$ that could easily be defined without reference to derived functors. |
Apr 1 |
revised |
Quillen's motivation of higher algebraic K-theory
added 1 characters in body |
Mar 31 |
answered | Quillen's motivation of higher algebraic K-theory |
Mar 29 |
comment |
Find sufficient and necessary conditions on $f$ in which the level curve $f(x,y)=0$ implies only one case $x=a$ for all real $y$
Does this mean that there exists an $a$ such that for all $y$, $f(x,y)=0$ implies $x=a$? Or does it mean that for all $y$, there exists an $a$ such that $f(x,y)=0$ implies $x=a$? |
Mar 27 |
revised |
What geometric information is carried by the Fourier coefficients of the components of a closed curve?
changed "smooth curve" to "smooth closed curve" in first sentence. |
Mar 17 |
awarded | Notable Question |
Mar 14 |
awarded | Nice Answer |
Mar 14 |
awarded | Nice Answer |
Mar 12 |
revised |
Source for Derogatory Quote About Graph Theory
edited body; edited title |
Mar 12 |
comment |
Origin of exact sequences
This abstract not only answers the OP's first question; it's also a great answer for the second. |
Mar 12 |
comment |
Origin of exact sequences
@Spock: Neither could I. But it's in Hurewicz's collected works. |
Mar 12 |
answered | Origin of exact sequences |
Mar 10 |
comment |
Sources in unimodular rows
You could start with Bass's book on Algebraic K-theory. You can also work through the many papers of people like Vaserstein and Suslin that make heavy use of unimodular rows. There's a paper by Swan and Towber called "A Class of Projective Modules That Are Nearly Free" that has some nice simple applications of these ideas, and would surely help to give you the flavor of the subject. |
Mar 10 |
awarded | Nice Answer |
Mar 7 |
comment |
intersection of finitely many maximal ideals
Equally obviously, you can drop the word "Dedekind".... |
Mar 6 |
accepted | Mean of i.i.d Random Variables With No Expected Value |
Mar 6 |
answered | Does the going-up theorem hold between flat algebras? |