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awarded  Good Answer
May
24
comment Is university math all about proofs?
What you've explained here is not so much that mathematicians do more than just write proofs, just that writing a proof is a complex process. "Do painters just make paintings?" "No no, we first of all have to come up with the idea for what to paint, then worry about composition, then sketch the lineart..." "Why do you do all that?" "Well, to get a painting out of it." "Okay, so you do just make paintings."
May
24
comment What does “2- place real function” mean?
You're going to have to include more context. It probably means a function mapping two real number inputs to a single real number output, though.
May
24
reviewed Close What is the meaning of $:s$ after a mathematical symbol?
May
20
comment Is 'Algebraic Number Theory' the study of the theory of algebraic numbers, or is it the study of the theory of numbers from an algebraic viewpoint?
@ZevChonoles In other words, the name satisfies the law of associativity.
May
20
revised Can anyone help me solve this?
added 491 characters in body
May
20
comment Proving the following number is real
The heart of it is: 1) to show that something is real, show that it equals its own conjugate, and 2) for numbers on the unit circle, the conjugate is the same as the inverse.
May
20
comment Can anyone help me solve this?
@Al3 Well, I left that unsolved deliberately. The key is that a tap pumps out the same volume of water every hour, so if you write $v$ for that volume, and $V$ is the volume of the pool, the pool will fill up in $V/v$ hours.
May
20
answered Can anyone help me solve this?
May
19
comment What is zero? Irrational or rational or it have both the properties?
Or less trivially, $2=\frac {\sqrt 8} {\sqrt 2}$
May
19
comment Decomposition for a Sum of Matrix Products
Is $X'$ the transpose?
May
18
comment What is meant by a stopping time?
You may find this question helpful.
May
17
comment Is there active research in trigonometry?
What do you mean by "modern values"? Furthermore, the fact that a problem is unsolved doesn't mean it's being actively researched.
May
17
comment Is there active research in trigonometry?
@NasuSama You sure about that?
May
17
answered Trouble understanding what a measure-zero set is.
May
17
comment Trouble understanding what a measure-zero set is.
What exactly do you mean when you say you don't understand what this means? Do you at least know the definition of a zero-measure set?
May
16
comment Are there mathematical objects that have been proved to exist but cannot be described in words?
Not only do you need to specify what you mean by "described", you need to define "exists". The intuitionist point of view is that when we're talking about mathematical objects, if you can't describe it, it doesn't exist - that imaginary objects are only conjured into existence by our describing them explicitly. From that point of view, what you're looking for is impossible.
May
16
answered A question of a video of real analysis: prove that $\overline A$ is closed.
May
13
awarded  Nice Answer
May
12
answered Theorem 1 in Khinchin's “Continued Fractions”