User:Ramiamro

I learned about wikipedia that:
 * 1) it is a website where people can publish, edit, and show there point of view, but it should be moderate, and viewed from different perspectives.
 * 2) you can write in more than 200 languages.
 * 3) people are not paid for there contribution.
 * 4) Don't worry about mistakes, some body or researchers will read what you write, and edit it until the article becomes very good "featured articles".
 * 5) people who write should comply with the website policies.

some complicated mathematical formula:


 * $$\int_a^b \!F(x)\,dx =f(b) - f(a)\,$$



\omega^2 = \left( g k + \frac{\sigma}{\rho} k^2 \right) \sinh (kh), $$ ∭

Question 1, Ass 2 i feel that Numerical stability and well-posed problems is poorly explained, so I suggest to add the following paragraph to it at the end.

numerical stability also could be affected by loss of significance, round off errors,order of the operations, for example using a machine that use less decimal digits result in loss of significance, and so cause the error to grow up. At the same time, round off numbers to a certain range of decimal digits, will cause the process to be numerically unstable especially when the process is very sensitive to the small changes. One more factor is the order of the operations and how many of them in the problem, in each operation the computer will cut off the number at certain number of decimal digits after rounding off, so it is better to do the operations that result in small values before those which give huge numbers relative to the number of significand figures the machine use.