1. Let's take a simple example. f(x)=x + c f '(x)=1

How, is the derivative local, if any value of f(x) can have the same derivative? lol... this one is funny.

2. Originally Posted by Kharakov
Let's take a simple example. f(x)=x + c f '(x)=1

How, is the derivative local, if any value of f(x) can have the same derivative? lol... this one is funny.
What is wrong with you?

3. Originally Posted by barbos
Originally Posted by Kharakov
Let's take a simple example. f(x)=x + c f '(x)=1

How, is the derivative local, if any value of f(x) can have the same derivative? lol... this one is funny.
What is wrong with you?
My sense of humor. Know its knot.

4. Finite-difference formulas are approximations for derivatives, not exact expressions. But there are exact formulas.

For integration, f(-n)(x) = 1/((n-1)!) int of (x - t)n-1 f(t) by t from t0 to x

For differentiation, f(n)(x) = n!/(2*pi*i) contour int of f(t) / (t - x)n+1 by t around x

One can use them to find fractional-derivative formulas, using the Euler gamma function to extend the factorial function to fractional args.

5. Originally Posted by Kharakov
Latex broken?
Latex is fixed!

6. Repeated integration:
$f^{(-n)}(x) = \frac{1}{(n-1)!} \int_{t_0}^x (x - t)^{n-1} f(t) dt$

Repeated differentiation:
$f^{(n)}(x) = \frac{n!}{2\pi i} \oint \frac{f(z)}{(x-z)^{n+1}} dz$

a contour integral, where the contour goes around x.

7. Originally Posted by Kharakov
...if no forum user is wearing latex...
I am wearing latex.

I always wear two condoms wherever I go. If I happen to find myself in a situation where I am about to have sex with someone, I remove one of the condoms... and boy, does it feel GREAT!

8. "I am wearing latex" was great to read, until I got to the part where you wear condoms. Thanks for the image. It will definitely help out in the future, when I don't want to hook up with a hot woman. Ok. It won't help in the future. I'm not going to have that chance. lol.

You're the first person I've spoke with who needed 2 condoms. Is it a genetic condition, or is one of them your gun?

I thought Inspector Sledgehammer was the only person who protected their gun during sex.

9. Originally Posted by Kharakov
"I am wearing latex" was great to read, until I got to the part where you wear condoms. Thanks for the image. It will definitely help out in the future, when I don't want to hook up with a hot woman. Ok. It won't help in the future. I'm not going to have that chance. lol.

You're the first person I've spoke with who needed 2 condoms. Is it a genetic condition, or is one of them your gun?

I thought Inspector Sledgehammer was the only person who protected their gun during sex.
no, the point is that with two condoms on, I can't feel a damn thing... so when I take one off, I'm SUPER sensitive and it feels great.

dumb joke originally intended to poke fun at those that say that they hate condoms because they numb the sensations.. which of course they do... So I say that (not only do I wear one...) I wear two!

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•