Number Theory Forum

Number Theory Help Forum

  1. Proof n^2 + n is even

    veturi
    proof
    • Replies: 8
    • Views: 817
    Renji Rodrigo
    Oct 4th 2009, 03:28 AM Go to last post

  2. Sum

    usagi_killer
    sum
    • Replies: 1
    • Views: 393
    aman_cc
    Oct 4th 2009, 01:22 AM Go to last post

  3. [SOLVED] Help with powers and roots

    Noxide
    powers, roots, solved
    • Replies: 4
    • Views: 681
    Noxide
    Oct 3rd 2009, 11:41 PM Go to last post

  4. Wink Division by 9 in five seconds!!!

    player007
    division, seconds 4 Attachment(s)
    • Replies: 1
    • Views: 722
    Unenlightened
    Oct 3rd 2009, 12:31 PM Go to last post

  5. Binomial sum

    streethot
    binomial, sum
    • Replies: 2
    • Views: 363
    Renji Rodrigo
    Oct 3rd 2009, 09:09 AM Go to last post

  6. Primes and Squares again

    dlbsd
    primes, squares
    • Replies: 6
    • Views: 481
    aman_cc
    Oct 3rd 2009, 07:16 AM Go to last post

  7. Prove that if p is an odd prime, 1^2 * 3^2 ...(p-2)^2 = (-1)^(p+1)/2 (mod p)

    keityo
    1 or 2, mod, odd, p22, prime, prove
    • Replies: 3
    • Views: 3,115
    PaulRS
    Oct 3rd 2009, 05:18 AM Go to last post

  8. Last 2 digits of 3^400

    ilikecandy
    digits
    • Replies: 3
    • Views: 4,361
    Matt Westwood
    Oct 2nd 2009, 03:39 PM Go to last post

  9. Sum of the factors

    skyskiers
    factors, sum
    • Replies: 4
    • Views: 690
    skyskiers
    Oct 2nd 2009, 02:05 PM Go to last post

  10. Primes and Squares

    dlbsd
    primes, squares
    • Replies: 1
    • Views: 710
    aman_cc
    Oct 2nd 2009, 12:00 AM Go to last post

  11. Fibonnaci numbers

    commerce-calc
    fibonnaci, numbers
    • Replies: 1
    • Views: 560
    malaygoel
    Oct 1st 2009, 02:12 AM Go to last post

  12. Proof question

    koukou8617
    proof, question
    • Replies: 2
    • Views: 527
    koukou8617
    Sep 30th 2009, 06:41 PM Go to last post

  13. Square integer

    dhiab
    integer, square
    • Replies: 1
    • Views: 709
    pomp
    Sep 29th 2009, 05:10 AM Go to last post

  14. [SOLVED] Divisibility property of a prime's central binomial coefficient

    russel
    binomial, central, coefficient, divisibility, modulus, prime, property, solved
    • Replies: 6
    • Views: 848
    Bruno J.
    Sep 28th 2009, 04:16 PM Go to last post

  15. A prime number problem

    Normis
    number, prime, problem
    • Replies: 4
    • Views: 556
    artvandalay11
    Sep 28th 2009, 02:13 PM Go to last post

  16. A nice reciprocity theorem

    mathman88
    nice, reciprocity, theorem
    • Replies: 0
    • Views: 421
    mathman88
    Sep 28th 2009, 11:16 AM Go to last post

  17. Need to finish this question by matlab? please help

    waterboy1203
    finish, matlab, question
    • Replies: 3
    • Views: 525
    Bruno J.
    Sep 28th 2009, 09:14 AM Go to last post

  18. proof about ....

    koukou8617
    proof
    • Replies: 2
    • Views: 607
    Defunkt
    Sep 28th 2009, 05:13 AM Go to last post

  19. Twin Prime Conjecture - Visual Proof

    vengy
    conjecture, prime, proof, twin, visual
    • Replies: 3
    • Views: 700
    mr fantastic
    Sep 28th 2009, 04:50 AM Go to last post

  20. two definitions of Carmichael numbers

    kobulingam
    carmichael, definitions, numbers
    • Replies: 2
    • Views: 675
    kobulingam
    Sep 27th 2009, 10:18 AM Go to last post

  21. could you proof this stasement,please?

    raed
    proof, stasement
    • Replies: 2
    • Views: 510
    Defunkt
    Sep 27th 2009, 05:18 AM Go to last post

  22. confusion with limit theory, involving l'Hopital's rule

    walleye
    confusion, involving, lhopital, limit, rule, theory
    • Replies: 1
    • Views: 958
    CaptainBlack
    Sep 27th 2009, 02:12 AM Go to last post

  23. Prime numbers

    ciccio
    numbers, prime
    • Replies: 1
    • Views: 496
    PaulRS
    Sep 24th 2009, 04:42 PM Go to last post

  24. Cryptography number theory??

    waterboy1203
    cryptography, number, theory
    • Replies: 0
    • Views: 533
    waterboy1203
    Sep 24th 2009, 01:00 PM Go to last post

  25. (n!(j)+1,n!(j)+1)=1 for 1<=i<j<=n

    Jer2145
    1<i&ltj&ltn
    • Replies: 2
    • Views: 525
    Opalg
    Sep 24th 2009, 12:38 AM Go to last post

  26. Find all prime numbers p,q,r such that (p/q)-(4/(r+1))=1

    redcherry
    numbers, p or q4 or r, prime
    • Replies: 1
    • Views: 708
    paweld
    Sep 23rd 2009, 11:37 PM Go to last post

  27. combinatorial problem??

    tanujkush
    combinatorial, problem
    • Replies: 2
    • Views: 670
    tanujkush
    Sep 23rd 2009, 10:29 PM Go to last post

  28. Root finding in three dimensions

    tempest33
    dimensions, finding, root
    • Replies: 3
    • Views: 474
    redsoxfan325
    Sep 20th 2009, 09:06 AM Go to last post

  29. Phi function

    Cairo
    function, phi
    • Replies: 1
    • Views: 498
    Gamma
    Sep 20th 2009, 08:46 AM Go to last post

  30. Independence with mod

    Bingk
    independence, mod
    • Replies: 5
    • Views: 702
    Bingk
    Sep 18th 2009, 10:53 PM Go to last post

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