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I need k (field) card(k)=n, n has not the form p^q where p is prime and q is natural how do i build k? is there a k to satisfy this?

for p^q whith that character we have Zp[x]/(poly)
where poly is in Zp[x] and poly is irreductible and grad(poly)=q

2006-06-19 14:03:23 · 5 answers · asked by lex_szoke 2 in Science & Mathematics Mathematics

for p^q whith that character we have Zp[x]/(poly)
where poly is in Zp[x] and poly is irreductible and grad(poly)=q, poly=ax^n+bx(^n-1)+......z, a....z in Zp[x] and grad(poly)=n, where "/" is the factorization of the field to a poly( with f=gq+r where r are the elements)

2006-06-19 14:14:32 · update #1

for p^q whith that character we have Zp[x]/(poly)
where poly is in Zp[x] and poly is irreductible and grad(poly)=q, poly=ax^n+bx(^n-1)+......z, a....z in Zp[x] and grad(poly)=n, where "/" is the factorization of the field to a poly( with f=gq+r where r are the elements of serched field)
if there is no k field to satisfy this pls mail me a proof of that.....lex_szoke@yahoo.com

2006-06-19 14:18:36 · update #2

cs@fmi@unibuc.ro

2006-06-19 14:21:22 · update #3

poly is irreductible over Zp[x]
means: Zp[x]=0 has no solution for x in Zp
any other details?

2006-06-19 14:27:15 · update #4

thank you for your grat answers!

2006-06-19 23:13:04 · update #5

5 answers

I'm writing up a proof right now that this is not possible.

Check out the pdf at:
http://www.geocities.com/euleratuo/

2006-06-19 14:40:25 · answer #1 · answered by Eulercrosser 4 · 0 2

Every finite field has cardinality a power of a prime. If you look at the multiplicative identity, 1, and consider the sequence 1, 1+1, 1+1+1, ..it has to repeat. So there is some natural number p with p*1=0. But the field axioms show that this p must be a prime, so Zp is a subfield of k. But then, k is a vector space over Zp. If there is a basis with q elements, then the cardinality of k is p^q.

In other words, you can't get a field of the type you are asking for.

2006-06-19 23:06:03 · answer #2 · answered by mathematician 7 · 0 0

The number of elements in all finite fields is the power of a prime, so it is not possible.

2006-06-19 21:10:31 · answer #3 · answered by Stanley K 2 · 0 0

How did you become so smart?????
Very nice...

2006-06-19 21:09:26 · answer #4 · answered by BEENSAVEDTODAY? 2 · 0 0

Please identify the main ideas of your question in plain English, if you'd please.

2006-06-19 21:08:01 · answer #5 · answered by Anonymous · 0 0

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