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Aug
5
comment Finding number of “Pixels” in a Circle using diameter
Are you sure the number of lattice points is equivalent to the number of pixels? The exact number of pixels is going to be down to how the software chooses to approximate curved lines using pixels, which might not be based on lattice points.
Aug
4
awarded  Civic Duty
Aug
4
comment 4 points, how to know if it's growing over time?
But in your latter example, the value goes down, then up, and then back down. Why should it be greater than $1$?
Aug
3
revised Square Root of matrices and multiplication
edited tags
Aug
2
answered What is the reason to introduce and study logarithmic functions?
Aug
2
revised n is even if and only if n leaves remainder 0, 2, 4, 6 or 8 when divided by 10
edited tags
Aug
1
comment What if 'proof by contradiction' is not a valid method of proof?
I mean, the simplest answer is that it's obviously valid. You may as well call into question modus ponens. There is a point where you just have to accept certain rules of logic as correct.
Jul
31
revised Find a pair of integers $n,x$ such that $84 = nx + (n-1)n$ and $x$ is odd
deleted 9 characters in body
Jul
31
comment Cardinality of the set of multiples of “n”
What do you mean "as $n\to\infty$"? Are you implying some kind of limit construction?
Jul
31
comment Largest Equilateral Triangle in a Polygon
I'm not sure about your very first sentence. Couldn't only $2$ or even $1$ be on the edge?
Jul
30
comment Produce unique number given two integers
And indeed, I believe a simple pigeonhole argument should show that a quadratic bound is the best you can hope for.
Jul
30
comment Produce unique number given two integers
If we're talking about a computer, this becomes trickier as soon as $a$ or $b$ get bigger than $64$... not a great range.
Jul
28
comment How can one visualize a homomorphic mapping.
Groups really aren't visual objects...
Jul
28
revised What is the area of a 12cm square?
edited body
Jul
28
answered What is the area of a 12cm square?
Jul
27
answered How to get the answer choice
Jul
27
answered Why relations are defined as the smallest
Jul
27
comment Why relations are defined as the smallest
@dorebell But how do you know the new relation will satisfy that property as well?
Jul
27
comment Why relations are defined as the smallest
There isn't "a smallest relation" (unless you count the empty relation), there is a "a smallest relation satisfying $P$", where $P$ is some property. The proof that such a thing exists will depend on what $P$ is. I think you should provide a few examples you've found where relations are defined being the smallest, because why the author does that probably depends on context.
Jul
25
comment Proving properties of closures using intersection of indexed sets and topology
When your question is about a specific problem, it's best to summarize it in the title, or at least indicate that it's about a specific problem. "Question about writing proofs with sets" sounds like a general question on methodology.