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awarded  Autobiographer
Jan
12
comment Divisibility Question.
However, your proof is sketchy. For example, you write $s/2$, but do you know that $s$ is even?
Jan
12
comment Divisibility Question.
$|t|<b$ is asserted by the Euclidean division. (If you need to prove it, just look at any proof that Euclidean division exists in $\mathbf{Z}$.)
Jan
5
comment Solve mod equation, how?
Modular inverses are usually computed using the extended Euclidean algorithm.
Jan
1
comment Potentially Flawed Probability Question
That's correct, yes. It does not fully answer the question, however (you need to prove that the winning probability of all the other sequences are less than $7/8$).
Jan
1
comment Potentially Flawed Probability Question
If Ha chooses HHH and Mo chooses THH, then Ha cannot win unless the three first tosses are HHH. Otherwise, there is a T before the three HHH, and Mo has won.
Dec
31
awarded  Yearling
Dec
31
comment Surjective (Onto) functions
The words "injective" and "surjective" are meaningless if the two sets involved are not specified.
Dec
30
comment Elliptic curve- Component of point
I'm not even sure what exactly you are trying to do, other than that it has something to do with adding unspecified points on unspecified elliptic curves. Maybe you should clarify that and ask a new question, we have been talking here for far too long.
Dec
30
comment Elliptic curve- Component of point
I don't know how to use the web-based interfaces, I have it on my computer.
Dec
30
comment Elliptic curve- Component of point
Sage, for example.
Dec
28
comment Is this sequence theorem true?
@Krish If the sequence converges to $L > 0$, then $a_n > 0$ for all sufficiently large $n$, which is close enough.
Dec
28
comment Is this sequence theorem true?
Applying the standard definition of a limit would work without any particular difficulty.
Dec
28
answered Is this sequence theorem true?
Dec
28
comment Elliptic curve- Component of point
This is not the place for a lecture, you should really read some background material from a textbook or something. I recommend the book of Hoffstein, Pipher and Silverman for an introduction to elliptic curves requiring not too much background.
Dec
28
comment Elliptic curve- Component of point
Do you know what $2P$ is, geometrically? With this and your other question, it seems you are trying to apply formulas without really knowing what you're doing.
Dec
25
answered Reference request: self-contained rigorous introductions to “cool” topics
Dec
13
answered Algorithm for the Hill cipher (finding the inverse of the determinant of a $2 \times 2$ matrix modulo $26$)
Dec
13
comment Every infinite abelian group has at least one element of infinite order?
Oh, yes, silly me, a polynomial has only finitely many non-zero coefficients...
Dec
13
comment Every infinite abelian group has at least one element of infinite order?
And also with achille hui's second example, if the field is $\mathbf{F}_2$. (Of course, every non-identity element has order $2$.)