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Forum: Discrete Math

Discrete Math Help Forum: Discrete mathematics, logic, set theory

  1. Sticky Thread   Difference equation tutorial: draft of part I

    chisigma
    difference, draft, equation, tutorial
    • Replies: 3
    • Views: 959
    chisigma
    September 21st 2011, 07:45 AM Go to last post

  2. Exclamation Sticky Thread   Please read before posting logic questions.

    mr fantastic
    logic, posting, questions, read
    • Replies: 0
    • Views: 1,365
    mr fantastic
    February 11th 2011, 11:34 AM Go to last post

  3. Sticky Thread   List of rules used to moderate MHF - please read carefully.

    mr fantastic
    carefully, list, mhf, moderate, read, rules
    • Replies: 0
    • Views: 1,164
    mr fantastic
    July 19th 2010, 10:33 PM Go to last post
  4.   Discussions  

  1. Suppose that gcd(a,b)=1 and that a|n and b|n. Prove that ab|n.

    qtpipi
    ab|n, a|n, b|n, gcda, prove, suppose
    • Replies: 1
    • Views: 588
    Opalg
    March 20th 2009, 05:38 AM Go to last post

  2. adjacency matrices

    sally1989
    adjacency, matrices
    • Replies: 2
    • Views: 150
    sally1989
    March 20th 2009, 04:25 AM Go to last post

  3. Find every integer k s.t. k>=3 and k-2 divides 2k

    qtpipi
    divides, integer, k&gt3
    • Replies: 1
    • Views: 209
    clic-clac
    March 20th 2009, 12:30 AM Go to last post

  4. Suppose gcd(a,b) = 1, prove gcd(na,nb) = n

    qtpipi
    gcda, gcdna, prove, suppose
    • Replies: 3
    • Views: 1,081
    qtpipi
    March 19th 2009, 05:51 PM Go to last post

  5. Equivalence Class HELP!

    kodai
    class, equivalence
    • Replies: 4
    • Views: 242
    kodai
    March 19th 2009, 06:52 AM Go to last post

  6. Proof with Factorials

    Foyboy543
    factorials, proof
    • Replies: 1
    • Views: 165
    Opalg
    March 19th 2009, 01:00 AM Go to last post

  7. Program Correctness Problem

    fusion1455
    correctness, problem, program
    • Replies: 1
    • Views: 149
    wytiaz
    March 18th 2009, 06:07 PM Go to last post

  8. Proving for mutally disjoint events A and B

    Kitizhi
    disjoint, events, mutally, probability, proving
    • Replies: 2
    • Views: 392
    Kitizhi
    March 18th 2009, 06:03 PM Go to last post

  9. !P(x) or P(!x)

    StefanLiebenberg
    • Replies: 2
    • Views: 221
    StefanLiebenberg
    March 18th 2009, 01:47 PM Go to last post

  10. Proof by Cases

    nick898
    cases, proof
    • Replies: 1
    • Views: 200
    Plato
    March 18th 2009, 09:36 AM Go to last post

  11. Problem related to permutation and combination.

    a69356
    combination, permutation, problem, related
    • Replies: 12
    • Views: 359
    Plato
    March 18th 2009, 08:12 AM Go to last post

  12. Finding integers when I have their lcm and gcd

    gianni
    finding, gcd, integers, lcm
    • Replies: 3
    • Views: 253
    gianni
    March 17th 2009, 09:25 PM Go to last post

  13. one-to-one and/or onto?

    relyt
    and or or, onetoone
    • Replies: 6
    • Views: 222
    GaloisTheory1
    March 17th 2009, 08:00 PM Go to last post

  14. Help with writing algorithm

    Van Dugall
    algorithm, writing
    • Replies: 0
    • Views: 126
    Van Dugall
    March 17th 2009, 05:14 PM Go to last post

  15. need to prove the definition

    joseph0177
    definition, prove
    • Replies: 2
    • Views: 253
    joseph0177
    March 17th 2009, 02:50 PM Go to last post

  16. Combinatorial argument

    VENI
    argument, combinatorial
    • Replies: 2
    • Views: 281
    awkward
    March 17th 2009, 02:46 PM Go to last post

  17. Basic proof

    VENI
    basic, proof
    • Replies: 1
    • Views: 175
    clic-clac
    March 17th 2009, 11:14 AM Go to last post

  18. Logic - if and only iff

    sabatier
    iff, logic
    • Replies: 3
    • Views: 231
    Plato
    March 17th 2009, 11:08 AM Go to last post

  19. find, with proof, the cardinalitis ofthe following sets

    joseph0177
    cardinalitis, ofthe, proof, sets
    • Replies: 0
    • Views: 148
    joseph0177
    March 16th 2009, 10:14 PM Go to last post

  20. prove some cardinalities fact

    joseph0177
    cardinalities, fact, prove
    • Replies: 0
    • Views: 152
    joseph0177
    March 16th 2009, 10:07 PM Go to last post

  21. Set of all counting numbers

    noles2188
    counting, numbers, set
    • Replies: 2
    • Views: 310
    noles2188
    March 16th 2009, 05:43 PM Go to last post

  22. Transitive Proof Help

    strongsad
    proof, transitive
    • Replies: 4
    • Views: 248
    Grandad
    March 16th 2009, 12:59 PM Go to last post

  23. relational algebra

    mikeqwerty
    algebra, relational
    • Replies: 2
    • Views: 348
    mikeqwerty
    March 16th 2009, 12:49 PM Go to last post

  24. Relational proof

    thehollow89
    proof, relational
    • Replies: 7
    • Views: 261
    Plato
    March 16th 2009, 12:38 PM Go to last post

  25. Fibonacci Numbers

    Creative
    fibonacci, numbers
    • Replies: 5
    • Views: 183
    Plato
    March 16th 2009, 09:46 AM Go to last post

  26. Neither one-to-one nor onto

    Creative
    onetoone
    • Replies: 5
    • Views: 1,676
    Plato
    March 16th 2009, 08:30 AM Go to last post

  27. Onto-Question

    Creative
    ontoquestion
    • Replies: 4
    • Views: 175
    Creative
    March 16th 2009, 07:07 AM Go to last post

  28. injective, surjective or bijective (no2)

    TTim
    bijective, injective, no2, surjective
    • Replies: 2
    • Views: 438
    TTim
    March 16th 2009, 01:58 AM Go to last post

  29. Integers and counting numbers

    noles2188
    counting, integers, numbers
    • Replies: 0
    • Views: 149
    noles2188
    March 15th 2009, 08:52 PM Go to last post

  30. Drawing a Venn diagram

    j-ram
    diagram, drawing, venn 1 Attachment(s)
    • Replies: 4
    • Views: 638
    j-ram
    March 15th 2009, 02:26 PM Go to last post

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