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comment Does there exist a proof of the Abel-Ruffini theorem without using Galois theory?
Abel’s proof precedes Galois theory. See en.m.wikipedia.org/wiki/Abel%E2%80%93Ruffini_theorem#Proof. See also mitpress.mit.edu/books/abels-proof.
Jul
31
answered Show that $t^n-1 \mid t^m-1 \Leftrightarrow n\mid m$
Jul
31
revised $Z_n$ as $Z[i]$-module
added 142 characters in body
Jul
31
answered $Z_n$ as $Z[i]$-module
Jul
31
comment Is ideal an “anti-field”?
The key word in both theorems is maximal.
Jul
31
answered Looking for a gentle intro to Linear Algebra
Jul
30
comment natural numbers
You need to find the inverse of 3 mod 2015.
Jul
30
revised Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
added 125 characters in body
Jul
30
answered Proof that a real number must occur in the domain between two other real numbers
Jul
30
comment (Theoretical) Complex Analysis Textbooks
Have you tried Rudin's Real and Complex Analysis?
Jul
30
comment Good introductory book for Probabilistic Number Theory
Have you tried the books mentioned in en.wikipedia.org/wiki/Probabilistic_number_theory ?
Jul
30
comment A good book on basic (Euclidean) geometry.
Possible duplicate of math.stackexchange.com/questions/107882/….
Jul
30
revised Ring homomorphism and ideal that contains the kernel
added 292 characters in body
Jul
30
answered Ring homomorphism and ideal that contains the kernel
Jul
30
comment Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
I wonder what you did yesterday night that led you to this...
Jul
30
revised Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
added 33 characters in body
Jul
30
revised Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
added 33 characters in body
Jul
30
answered Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
Jul
30
revised Fibonacci Cyclic Pattern
deleted 6 characters in body