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1d
revised Examples of “Non-Logical Theorems” Proven by Logic
edited body
1d
answered Examples of “Non-Logical Theorems” Proven by Logic
Jul
26
comment Book/Article recommendation
See math.stackexchange.com/questions/99659/essays-on-the-real-line.
Jul
25
comment taking convex hull does not add extreme points
$conv(S)$ contains all element of $S$, including the extreme points in $S$. Perhaps you mean that the extreme points of $conv(S)$ are in $S$?
Jul
25
comment Introduction and Prerequisites to Abstract Algebra
Basic Algebra II is much harder, meant for graduate studies.
Jul
25
comment Is this number an integer, an irreducible fraction, or an irrational number?
Every real number is an integer, an irreducible fraction or an irrational number...
Jul
25
comment Introduction and Prerequisites to Abstract Algebra
Basic Algebra I by Jacobson is a wonderful book. Effort reading it will be rewarded.
Jul
24
answered Showing that if $p$ is prime, then $(p^4 + 4)$ can't be prime
Jul
24
comment A question on the proof of 14 distinct sets can be formed by complementation and closure
+1, excellent answer!
Jul
24
comment If $A^2$ is the zero matrix, show that $A$ is linearly dependent?
@supersymétrie, see my edited answer.
Jul
24
revised If $A^2$ is the zero matrix, show that $A$ is linearly dependent?
added 134 characters in body
Jul
24
answered If $A^2$ is the zero matrix, show that $A$ is linearly dependent?
Jul
23
answered Learning Math with Mathematica
Jul
23
comment What are some 'conceptualizations' that work in mathematics but are not strictly true?
Probably better suited to matheducators.stackexchange.com.
Jul
23
comment Defining an inner abstract vector space
The inner product need not be defined "componentwise". Consider for instance the space of continuous functions on $[0,1]$ with inner product given by the integral of the product.
Jul
23
comment Possibilities of calculate the determinant of an $168\times168$ matrix
You'll gave to be very careful here to exploit the sparsity of the matrix. If done blindly, Laplace expansion will need $168!$ operations, which will take longer than the universe has existed.
Jul
23
revised Proving inequality $3^{n^2} > (n!)^4$
added 3 characters in body
Jul
23
answered Proving inequality $3^{n^2} > (n!)^4$
Jul
23
answered Applications of Geometry to Computer Graphics