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Jan
10
comment Does the set of all fields exist ?
(just a comment, related to the last paragraph): If we restrict to ordered fields, there are also the Surreal numbers Field (and the isomorphic maximal hyperreals Field) which contain all possible ordered fields as subfields. (Field instead of field because they are classes, not sets). See: Surreals
Sep
15
revised Is it true or false : p↔q does not imply p→¬q?
No need for the initial "I have a doubt"
Sep
15
suggested approved edit on Is it true or false : p↔q does not imply p→¬q?
Jun
8
revised Why do the equations $Ax + By + Cz= D$ represent planes in $\Bbb R^3$ and not lines?
The previous edit messed the title.
Jun
8
suggested approved edit on Why do the equations $Ax + By + Cz= D$ represent planes in $\Bbb R^3$ and not lines?
May
24
answered Find all solutions in N of the following Diophantine equation
May
24
comment Compute $\lim_{n \to \infty} \left(\frac{1}{\sqrt{n^3+1}} + \frac{1}{\sqrt{n^3+4}} + \cdots + \frac{1}{\sqrt{n^3+n^2}}\right)$
@GregoryGrant you need to correct the answer. (the $n / \sqrt{n^3+n^2}$ to $n / \sqrt{n^3}$)
May
24
comment Compute $\lim_{n \to \infty} \left(\frac{1}{\sqrt{n^3+1}} + \frac{1}{\sqrt{n^3+4}} + \cdots + \frac{1}{\sqrt{n^3+n^2}}\right)$
@Gregory your inequality is wrong. $n / sqrt(n^3+n^2) > 1 / sqrt(n^3)$
May
9
suggested rejected edit on Math problems that are impossible to solve
May
9
comment Math problems that are impossible to solve
I agree with Gerry. I was considered a big surprise when - some thousands of years ago - they proved this, and therefore that there are irrational numbers.
May
9
comment Simplify $\left(ab \sqrt[4]{a^{3}/\sqrt{b\sqrt{b}}}\right)^{2}$
13 x 2 = 26 and 28 x 2 = 56. Where did the two 16 disappear into?.
Apr
29
comment How to construct a product set whose complement is not a product set?
Why not $A \times X \subset X \times X$ ?
Apr
6
comment Is There any formula to calculate automorphism with the spesific graph?
Dn x (Sk)^n where k = s-2 I'm not exactly sure about the group itself but the size of it is certainly 2n x (s-2)^n. Matches your 2x3x(3-2)^3=6 and 2x4x(3-2)^4=8
Apr
6
comment Is There any formula to calculate automorphism with the spesific graph?
The group seems to be D4 x (S2)^4
Apr
6
comment Inequality involving Square Root
The answer is correct but not the solution.
Mar
26
comment Seeking guide for project.
The "Knot Book" by Colin Adams is my favourite. You should definitely have a look at it if you can find it in the univ. library.
Jan
18
comment Why do some other people use dek and el rather than letters as the eleventh and twelfth digits in the dozenal or duodecimal system?
"deka" is the Greek word for ten. It looks closer to dek than decem.
Dec
20
awarded  Constituent
Dec
18
comment Does this algorithm find prime numbers only?
" for verifying that 147 is prime, ..."? The wording does not look appropriate, considering that 147 is not prime.
Dec
13
comment Trisecting an angle
and another +1 for the conclusion that you must have made a mistake.