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1d
revised Reference Request to Prepare for Hatcher's “Algebraic Topology”
edited tags
1d
answered Reference Request to Prepare for Hatcher's “Algebraic Topology”
Nov
21
answered Text similar to chapter 9 of Topology from James Munkres
Nov
16
accepted Why must a map from $X$ to $S^{n}$ not be onto for it to be null homotopic
Nov
15
comment Why must a map from $X$ to $S^{n}$ not be onto for it to be null homotopic
@MarianoSuárez-Alvarez Thanks for the eye-opener. Maybe I could ask you to please elaborate a bit. Of course, now I am doubly confused - especially in view of the Addendum I just posted. Can I go so far as to think that my initial confusion is valid? Thanks. With regards,
Nov
15
revised Why must a map from $X$ to $S^{n}$ not be onto for it to be null homotopic
added 374 characters in body
Nov
15
asked Why must a map from $X$ to $S^{n}$ not be onto for it to be null homotopic
Nov
13
comment Prove that it is a tautology
Evidently you are new here. Perhaps you would keep in mind that everyone who asks a question here is, to some degree, asking for help. So there is no advantage to the last part of your title. Also, uses of exclamation points (other than to indicate, e.g., factorial) is considered shouting - which is not well received. So you might want to reconsider your title. Also this sounds a bit like homework, if that is the case, you should also add that tag. As well, you will get a better response if you show some of what you tried, and Just using "Show" is not the best approach.
Nov
8
answered Best book for topology?
Nov
7
accepted Regarding the proof in “Gamelin” that any reparametrization of a path lies in the same homotopy class
Nov
7
revised Regarding the proof in “Gamelin” that any reparametrization of a path lies in the same homotopy class
added 173 characters in body
Nov
7
asked Regarding the proof in “Gamelin” that any reparametrization of a path lies in the same homotopy class
Nov
7
comment Motivation for the proof of the associativity of multiplication of equivalence classes of paths
@InTransit Great comment, and an especially incisive and apparently unique remark in the form of the question regarding sloped lines.
Nov
2
comment infinitely many units in $\mathbb{Z}[\sqrt{d}]$ for any $d>1$.
@ndroock1 Can't find it. Maybe these pieces by Keith Conrad will be of use to you: math.uconn.edu/~kconrad/blurbs
Oct
27
comment How to read homotopy schematics?
Dear M - Thanks for your excellent book recommendations. Always much appreciated. Especially as a self-studier I think the McCleary text will be outstanding. I never would have found it. With regards,
Oct
15
answered Choosing final year project
Oct
10
awarded  Necromancer
Oct
7
comment Reference request for Algebraic Number Theory sources for self-study
Hi - You may also be interested in these excellent, complete notes from a course given at Univ. of Chicago elaborating on the main ANT chapters in "Ireland & Rosen." math.uni-bonn.de/people/morrow/242.pdf
Oct
6
accepted Two different topological spaces with the same set of underlying points
Oct
5
comment Give example of a set which has No Extreme Point !!..
Give an example of a question without two exclamation points and two periods (points)