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2h
comment Graph Combinatorics: How many such Graphs are there?
OK. If you figure it all out, I encourage you to write it up and post it here as an answer.
12h
comment Does Tom catch Jerry?
What shape is the wall?
12h
revised Is the set of points or the set of lines on a plane “larger”?
edited tags
12h
comment How do you determine the form of the particular solution to a nonhomogeneous recurrence relation?
So, are you OK now?
12h
comment Graph Combinatorics: How many such Graphs are there?
So, find anything useful at those webpages?
12h
comment Conjugacy classes of the representatives
How you do those things depends on what you know about the group to begin with. You might enjoy rutherglen.science.mq.edu.au/ccooper/Groups/… and rutherglen.science.mq.edu.au/ccooper/Groups/…
12h
comment set of numbers, elementary set theory
Have you never seen numbers put on an axis?
18h
comment Calculate a determinant.
Subtract the first row from each of the others, looks like you get a matrix that should be easier to deal with as it's mostly zeros.
18h
comment set of numbers, elementary set theory
Incomprehensible. Please explain the problem to someone who can understand the math and who can express herself well in English, and have her show you how to pose the question.
22h
comment Minimum number of real multiplications to multiply two quaternions
If you can get the book Matters Computational by Jorg Arndt, quaternion multiplication is discussed on pp 818-819.
22h
comment Minimum number of real multiplications to multiply two quaternions
Now posted to MO, mathoverflow.net/questions/203759/…
1d
comment A miraculous number N
@Charles, you're right, of course. I may have been thinking of a result that's conditional on the Riemann Hypothesis.
1d
comment How to test if these are a vector space and find the basis?
Though it's easier to check the axioms of a subspace.
1d
comment Galois group of $x^4-1$ over $\mathbb{Q}$.
If you look at the list of Related questions on this page, you will see many "find the Galois group" problems, and you may be able to learn quite a bit from the answers.
1d
comment Relation normal matrix and characteristic polynomial
@Peter, yes. ${}$
1d
comment A miraculous number N
It is a theorem that there is always a prime between consecutive cubes, a conjecture (but one that everyone believes) that there's always a prime between consecutive squares.
1d
comment Linearizing an expression involving exponentials
$\log(1-(f(x)/A))=Bx$.
1d
comment Proof for the necessity of conditions for a subspace
Having an addition means being closed under addition. Similarly for scalar multiplication.
2d
revised Social Golfer Problem - Quintets
formatting
2d
comment Finite amount of primes in sequence
So, any thoughts about the situation, Martin?