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mathmath333

  • one year ago

what does this sign means ?

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  1. mathmath333
    • one year ago
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    reversed A

  2. mathmath333
    • one year ago
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    |dw:1435770248432:dw|

  3. SolomonZelman
    • one year ago
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    for all

  4. geerky42
    • one year ago
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    \thread

  5. SolomonZelman
    • one year ago
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    like if you say \(\forall n\in {\bf R}\)

  6. mathmath333
    • one year ago
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    what is thread ?

  7. SolomonZelman
    • one year ago
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    that means for all real numbers n

  8. SolomonZelman
    • one year ago
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    for all, that is the meaning

  9. SolomonZelman
    • one year ago
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    questions?

  10. geerky42
    • one year ago
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    Just my way to saying that @SolomonZelman had it all. No need to get replies from other users

  11. mathmath333
    • one year ago
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    ok tnx . it means (for all)

  12. SolomonZelman
    • one year ago
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    tnx:) I saw that sign once, never used it tho' because no one qould get it, although it is a good tool to save space.

  13. SolomonZelman
    • one year ago
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    would*

  14. SolomonZelman
    • one year ago
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    Is that from a tutorial of a person who is obsessed with notations?

  15. SolomonZelman
    • one year ago
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    I don't really se it used alot... in any case, you now know it:)

  16. mathmath333
    • one year ago
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    yep i m proud i know it

  17. SolomonZelman
    • one year ago
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    I clicked on spraguer that I saw just now, and glitched:D

  18. ganeshie8
    • one year ago
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    \[\forall x\in\mathbb{R^+}~x\gt \sin x\]

  19. mathmath333
    • one year ago
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    is their any link that gives informtion on all mathmatical signs and its meaning

  20. ganeshie8
    • one year ago
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    look up quantifiers

  21. mathmath333
    • one year ago
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    \(0>\sin 0\) ?

  22. ganeshie8
    • one year ago
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    0 is not a positive real number

  23. mathmath333
    • one year ago
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    oh forget that \(\huge \mathbb{R^{\color{red}{+}}}\)

  24. ganeshie8
    • one year ago
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    you may think of \(\forall \) as a for/foreach loop in a programming language

  25. ganeshie8
    • one year ago
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    \[\forall x\in \color{red}{X} ~ ~ \color{blue}{\text{statement}}\] the \(\color{blue}{\text{statement}}\) is applicable to "all" the elements of set \(\color{red}{X}\)

  26. mathmath333
    • one year ago
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    i have also just seen reversed E |dw:1435771106226:dw|

  27. mathmath333
    • one year ago
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    ok i see that sign \(\forall\) is from set theory

  28. mathmath333
    • one year ago
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    i have seen as "there exist" written as it meaning

  29. ganeshie8
    • one year ago
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    \(\exists\) refers to existence of at least one that satisfies the statement that follows

  30. ganeshie8
    • one year ago
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    \[\exists x\in \mathbb{R}~:~x^2=2 \] means there exists at least one real number \(x\) "such that" the square of it equals 2

  31. SolomonZelman
    • one year ago
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    yes, lol, √2

  32. SolomonZelman
    • one year ago
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    or -√2

  33. SolomonZelman
    • one year ago
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    ... ±√2

  34. SolomonZelman
    • one year ago
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    (i am using alt shortcuts)

  35. ganeshie8
    • one year ago
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    can you guess what below statement means \[\large \not \exists x\in \mathbb{Q}~:~x^2=2 \]

  36. mathmath333
    • one year ago
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    what is \(\large \mathbb{Q}\) ?

  37. ganeshie8
    • one year ago
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    "set" of rational numbers

  38. mathmath333
    • one year ago
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    there exists no rational numbers that satisfy \(x^2=2\)

  39. ganeshie8
    • one year ago
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    Yes, thats same as saying \(\sqrt{2}\) is irrational

  40. mathmath333
    • one year ago
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    \(\not \exists \mathbb{GM}:\text{GM}:\text{stockfish6.0} ::1:0\) guess the statement

  41. ganeshie8
    • one year ago
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    there doesn't exist a grandmaster who beat the stockfish 1-0

  42. ganeshie8
    • one year ago
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    good one!

  43. mathmath333
    • one year ago
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    yep correct

  44. mathmath333
    • one year ago
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    it is important to mention stockfish version 6.0

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