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comment Existence of a map $\phi:\mathbb{Z}_{N^2}^* \mapsto \mathbb{F} $
Based on chinese remainder theorem there is an isomorphism: $\phi:\mathbb{Z}_{N^2}^* \mapsto \mathbb{Z}_{p^2}^* \times \mathbb{Z}_{q^2}^*$ And if $p$ and $q$ are primes then $\mathbb{Z}_{p^2}^*$ and $\mathbb{Z}_{q^2}^*$ constitute a field. I think this is one possible solution
Apr
15
asked Existence of a map $\phi:\mathbb{Z}_{N^2}^* \mapsto \mathbb{F} $
Mar
7
comment “Great Circle” distance
the norm is not computed correctly . It is not r but
Mar
1
comment Great arc distance between two points on a unit sphere
Even if without the wikipedia definition i cant see how the formula of inner product between $v_1$ and $v_2$ gives the result you wrote
Feb
28
comment Great arc distance between two points on a unit sphere
What you get is not the formula from here: en.wikipedia.org/wiki/Great-circle_distance#Formulas . I can't understand how the differences in cos are derived since you compute the inner product
Feb
28
comment Great arc distance between two points on a unit sphere
how exactly you got the dot product ?
Feb
4
awarded  Notable Question
Dec
27
awarded  Popular Question
Dec
12
asked Does this modular arithmetic equation hold?
Dec
12
comment Can i approximate the inner product of two vectors by the sum of their coefficients?
@nomen what is an NDA?
Dec
5
comment is it possible for two fields with the same characteristic to not be isomorphic?
Sorry i forgot to define it. Slide 37
Dec
5
comment is it possible for two fields with the same characteristic to not be isomorphic?
Is this slide wrong written then crypto.biu.ac.il/winterschool2013/NigelSmart-BIU2013.pdf?
Dec
3
asked What is so special about frobenious endomorphisms in elliptic curves?
Dec
3
comment How do you determine if an elliptic curve over a finite field is cyclic?
I am totally lost. What is this symbol $\ominus$?
Dec
3
comment What is a primitive point on an elliptic curve?
How can you find the primitive point of a curve?
Dec
3
comment Prove that there are $p+1$ points on the elliptic curve $y^2 = x^3 + 1$ over $\mathbb{F}_p$, where $p > 3$ is a prime such that $p \equiv 2 \pmod 3$.
How this is true :$$\#\{(x,y) \in \mathbb{F}_p^2 : y^2 = x^3 + 1\} + \#\{\infty\} = \#\{(x,y) \in \mathbb{F}_p^2 : y^2 = x\} + 1.$$
Dec
3
comment Doubling a point on an elliptic curve
why s is so when we double a point, i can't figure it out
Nov
29
comment Estimation of inner product
Can you elaborate more on these different cases?
Nov
29
asked Estimation of inner product
Nov
27
revised Has this system unique solutions?
added 39 characters in body