1. H

    Invert Laplace

    Hi guys!! I have been working for a long time now with a tricky differential equation. I have managed to get a Laplace-function, which I now would like to invert in order to get a function y(t). \mathcal{L}(LHS) =...
  2. S

    Invert this ellipsoid formula

    Sorry if this is in the wrong forum, but I think it applies best here and it doesn't have any calc in it. I'm doing some coding for a social site. I have already uploaded a list of all US zip codes and all combinations of the first 3 letters of CA postal codes, and their associated Lat/Lon...
  3. T

    Invert expression to find the Chemical potential of an Ideal Bose Gas

    Hi I'm having trouble with this step of the derivation of the chemical potential for an ideal fermi gas in the low temperature limit I've got as far as to find $ E_F = \mu \left(1+\frac{\pi^2}{12} \left(\frac{kT}{\mu}\right)^2 + ...\right) and need to invert this expression to get the...
  4. A

    Invert this "Polynomial" Function?

    Hi I have read various responses to finding an inverse function and they all look reasonably straight forward but was wondering whether anyone might be able to assist me in finding an inverse function for the following; y= ax + bx^c Clearly it is not possible to find 'x' in terms of...
  5. S

    Invert Matrix

    Been a while since I had to do this... totally forgot how to <_< the only thing I can remember is A^{-1} = \frac{1}{ad-bc} * \left(\begin{array}{cc}d&-b\\-c&a\end{array}\right) or something... But this leaves me absolutely clueless on how to solve A^{-1} =...
  6. L

    How to invert binary number in schematic?

    I am trying to make a 5-bit add/subtract schematic. If C-in is 1 it subtracts and adds C-in to make the negative number. How do I make one 5-bit number (B) invert when I chose 1 as C-in? C-in(add 0/1 subtract) | | B(0/1) -------...
  7. D

    when can you invert the sums of a double summation?

    I think the answer is that you can do so whenever both series are absolutely convergent? Can someone confirm or deny this?
  8. T

    Derivative of invert tan?

    I read from the rules that the derivative of (tan^-1)x is (1/x^2+1), but I cannot figure out why and I can't find any explantations on the web. Anyone have any ideas? Thank you.