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Tag: prove

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    • Replies: 5
    • Views: 62
    Last Post: Today 13:55
    by MarkFL  Go to last post

    Forum:
    Geometry

  1. Prove that if g(f(x)) is injective then f is injective

    Started by Cbarker1, January 16th, 2018 18:52
    belongs, gfx, implies, injective, prove
    • Replies: 1
    • Views: 59
    Last Post: January 16th, 2018 20:38
    by Euge  Go to last post

    Forum:
    Analysis

  2. Problem Of The Week # 295 - Jan 04, 2018

    Started by Ackbach, January 4th, 2018 17:07
    perpendicular, potw, problem, prove, triangle
    • Replies: 1
    • Views: 87
    Last Post: January 12th, 2018 14:39
    by Ackbach  Go to last post
  3. Prove the nested radicals identity

    Started by lfdahl, January 9th, 2018 18:24
    identity, nested, prove, sqrtn+sqrtn-, [sqrtn
    • Replies: 4
    • Views: 121
    Last Post: January 10th, 2018 15:25
    by lfdahl  Go to last post
  4. prove that dirichlet function is periodic

    Started by esuahcdss12, December 26th, 2017 14:19
    dirichlet, function, functions, periodic, prove
    • Replies: 6
    • Views: 157
    Last Post: December 28th, 2017 13:26
    by Krylov  Go to last post

    Forum:
    Calculus

  5. Trigonometric sum identity

    Started by lfdahl, December 16th, 2017 16:21
    identity, prove, sum, trigonometric, [sum_j=1^n-1csc^2left
    • Replies: 2
    • Views: 140
    Last Post: December 22nd, 2017 16:16
    by lfdahl  Go to last post
  6. Definite integral challenge

    Started by lfdahl, December 17th, 2017 18:19
    $$int_0^piln, challenge, definite, integral, prove
    • Replies: 2
    • Views: 110
    Last Post: December 18th, 2017 15:27
    by lfdahl  Go to last post
  7. A finite set of integers

    Started by lfdahl, December 14th, 2017 04:52
    $a^2b^2$, $t$, finite, prove, set
    • Replies: 2
    • Views: 78
    Last Post: December 15th, 2017 07:01
    by lfdahl  Go to last post
  8. limit of sequence

    Started by esuahcdss12, December 12th, 2017 13:40
    find, happening, limit, prove, sequence
    • Replies: 7
    • Views: 119
    Last Post: December 12th, 2017 15:30
    by I like Serena  Go to last post

    Forum:
    Calculus

  9. prove limit with convergence tests

    Started by esuahcdss12, December 11th, 2017 17:19
    convergence, limit, prove, sequence, tets
    • Replies: 2
    • Views: 69
    Last Post: December 12th, 2017 04:14
    by esuahcdss12  Go to last post

    Forum:
    Calculus

    • Replies: 2
    • Views: 100
    Last Post: December 1st, 2017 01:22
    by DrWahoo  Go to last post

    Forum:
    Calculus

  10. Calculus inequality challenge

    Started by lfdahl, November 28th, 2017 17:58
    calculus, geq, prove, satisfies, [int_0^1fracfxfx+frac12dx
    • Replies: 2
    • Views: 90
    Last Post: November 29th, 2017 16:57
    by lfdahl  Go to last post
  11. prove supremum and infimum

    Started by esuahcdss12, November 26th, 2017 18:17
    calculas, infimum, prove, sets, supremum
    • Replies: 1
    • Views: 74
    Last Post: November 26th, 2017 18:42
    by Euge  Go to last post

    Forum:
    Calculus

  12. Prove the sum identity

    Started by lfdahl, November 20th, 2017 18:13
    $sum_n=0^infty, fracn^2n=2e$, limit, prove, sum
    • Replies: 4
    • Views: 127
    Last Post: November 21st, 2017 09:06
    by lfdahl  Go to last post
  13. axiomatics

    Started by solakis, September 11th, 2017 19:35
    a+b=0vee, aa=bblongrightarrow, axiomatics, forall, prove
    • Replies: 2
    • Views: 190
    Last Post: November 16th, 2017 09:49
    by solakis  Go to last post
  14. Unsolved Challenge
    Prove √(sinx)>sin√(x)

    Started by anemone, October 15th, 2017 00:20
    $sqrtsin, √sinxsin√x, prove, sqrtx$, xsin
    • Replies: 2
    • Views: 222
    Last Post: November 13th, 2017 11:53
    by anemone  Go to last post
  15. [SOLVED] Probability measure: prove or disprove

    Started by mathmari, November 5th, 2017 12:20
    disprove, measure, overlineb$, probability, prove
    • Replies: 4
    • Views: 133
    Last Post: November 10th, 2017 16:13
    by mathmari  Go to last post
  16. Inequality of Four Variables

    Started by anemone, July 29th, 2016 00:14
    $aba^2+, bcb^2+, b^2, c^2, prove
    • Replies: 1
    • Views: 286
    Last Post: November 6th, 2017 17:25
    by MarkFL  Go to last post
  17. triangular relations

    Started by solakis, October 17th, 2017 18:33
    ad^2+de^2+ae^2=, bd=de=ec, points, prove, triangular
    • Replies: 1
    • Views: 110
    Last Post: November 6th, 2017 16:07
    by Opalg  Go to last post
  18. Unsolved Challenge
    Prove a quartic equation has at least one real solution

    Started by anemone, November 3rd, 2017 21:52
    equation, greater, prove, real, solution
    • Replies: 2
    • Views: 147
    Last Post: November 5th, 2017 01:42
    by anemone  Go to last post
  19. Unsolved Challenge
    Trigonometric Sum

    Started by greg1313, October 31st, 2017 00:20
    $n=3, prove, show, sum, trigonometric
    • Replies: 2
    • Views: 150
    Last Post: November 3rd, 2017 22:09
    by greg1313  Go to last post
  20. Unsolved Challenge
    Trigonometric equality

    Started by anemone, October 26th, 2017 12:39
    $sin, equality, prove, sin, trigonometric
    • Replies: 1
    • Views: 217
    Last Post: October 29th, 2017 08:47
    by Opalg  Go to last post
  21. Problem Of The Week #283 Oct 13th, 2017

    Started by anemone, October 13th, 2017 12:14
    $a_2=dfrac12$, $kge, 1.$, problem, prove
    • Replies: 1
    • Views: 189
    Last Post: October 20th, 2017 11:01
    by MarkFL  Go to last post
  22. Unsolved Challenge
    Prove (a-b)ᵃ⁻ᵇaᵃᵇ⁻ᵃ ≥ (a-1)ᵃᵇ⁻ᵇ

    Started by anemone, October 19th, 2017 11:38
    $a$, $b$, a-bᵃaᵃ, positive, prove
    • Replies: 0
    • Views: 102
    Last Post: October 19th, 2017 11:38
    by anemone  Go to last post
  23. sequences

    Started by solakis, October 1st, 2017 10:58
    1^n, diverges, prove, sequence, sequences
    • Replies: 8
    • Views: 336
    Last Post: October 17th, 2017 20:17
    by solakis  Go to last post
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