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Mar
31
comment Is Proof By Induction Necessary?
This is a duplicate of [this question], to the point that the question asker almost (possibly unintentionally) quoted that question verbatim.
Mar
29
comment What is abstraction of direction in considering vectors such as used in Engineering & Physics?
The direction of a vector is just the one-dimensional subspace that it generates.
Mar
29
awarded  Nice Question
Mar
29
revised A conjecture on uniform convergence of functions with a compact metric space
edited title
Mar
29
answered Proving that $\Omega$ is bounded.
Mar
29
comment Confusion regarding the definition of limit
I don't understand what you're asking. Are you trying to come up with an alternative definition of a limit?
Mar
29
revised Question about Wantzel's proof of the necessary condition for compass/straightedge constructibility
edited body
Mar
28
answered Question about Wantzel's proof of the necessary condition for compass/straightedge constructibility
Mar
28
asked Why study solvability of polynomials of prime degree?
Mar
27
comment How can $y$ and $y'$ be independent in variational calculus?
There are a couple of questions about this on physics.SE: physics.stackexchange.com/questions/885/… and physics.stackexchange.com/questions/119992/… . But a question on math.SE is a good idea to get some more mathematical answers.
Mar
26
comment On the existence of a certain sequence of positive numbers
How do you know that last series diverges?
Mar
25
comment Math of password cracking
Why do you think the results are too big? Can you give an example?
Mar
25
comment Sufficient rigor in proving $f(x)$ is continuous at the origin, for $f$ analog to the Dirichlet function.
@Analysis Fix $\epsilon$. Then there exists a $\delta_1$ that works for $g$ and a $\delta_2$ that works for $h$. The smaller of the two works as the $\delta$ for $f$.
Mar
24
comment Number of triangles in a planar graph
When you say "triangular region", do you mean complete subgraphs of three vertices?
Mar
24
comment How can I interpret the ratio $\frac{f(x_0)}{f'(x_0)}$?
By "projected segment length", you mean $x_0-x_1$ (give or take a sign which I don't feel like working out), where $x_1$ is the $x$-coordinate at which the tangent line crosses the $x$-axis.
Mar
24
comment How to learn about the Rubik's Cube?
On "Am I holding myself back if I refuse to read what other people have done before I work it out for myself", normally I would say yes, if we were talking about a major area of mathematics (for instance if you were refusing to read a textbook on number theory until you could derive quadratic reciprocity on your own), but if it's just solving a Rubik's cube then no, it's not a big deal.
Mar
24
awarded  Popular Question
Mar
24
comment Cardinality of transcendental numbers
Why is it a problem that transcendental and algebraic numbers can be complex?
Mar
24
answered Is it true that the splittings fields cannot be isomorphic?
Mar
24
answered Solve the following recurence relation.