Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20121023 01:21:33
Li(x)What is li(x)?I know it is logarithmic integral function,but how do i find li(x),for instance,what will be li(5)? #2 20121023 02:08:45
#4 20121023 05:55:38
Re: Li(x)You can use the series given at http://en.wikipedia.org/wiki/Logarithmi … esentation The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #6 20121023 19:20:45
Re: Li(x)Depends on the arguments or how much accuracy you need. There are several ways for each. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #8 20121023 19:31:47
Re: Li(x)Yes, but first I need that information from you. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #9 20121023 20:07:52
Re: Li(x)I just want to know how to find li(x),but you could show an example of your own. #10 20121023 20:12:41
Re: Li(x)Series are of different types. For small values of x we use Taylor series. For large values we use Asymptotic expansions and Series that are expanded around infinity. Read this: http://numbers.computation.free.fr/Cons … rimes.html now you will understand why there are only approximate answers. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 