Recent content by russel.arnold

let f(X) : Rn --> R be a function defined on convex set S s.t S is a subset of Rn (real space n-dim). Let f is positive throughout. Then define g(x) = (f(x))^2. Prove that if f(x) is convex then g(x) is also convex.

ok thanks.. now i know how to do it

how can i solve x1 + x2 = 5 2x1 + x2 = 4 using simplex method? thanks

(2:1,3) represents 2,1 and 3 elements of a row. ":" and "," are just the delimiters, my task is to separate the integers from these delimiters

hi want to read the rows of a matrix from a file which are written in the following way : (2:1,3), (4:3,1), (2:1,8) i am working in java, i am not able to figure out how to do this using bufferedreader :( can someone help? Thanks

yes, i will be considering tan from 0 to infinity, i.e all possible branches and i need my solutions to be accurate. hence graphical approach won't work :(

i want to solve tan (f(x)) = g(x) ..also i want to determine all the possible solutions! which numerical method i should use?

Hi, I have a class, say myclass and it takes two strings (let s and g ) and one int ( say i) as its arguments. It looks like, public class { String s , g; int i ; public void myclass(String sname, String gname, int k){ s = sname; g = gname; i = k; } } Now, I have several...

Hi all, I have a filter whose amplitude and phase response in terms of w(omega) is known to me which i calculated numerically. Hence, the value is known only for discrete values of w(omega). Now, I want to know the output which this filter will produce on sending a temporal pulse(pulse in...

We know that hilbert transform is a linear filter whose frequency response is given as -j*sgn(f), where f is the baseband frequency. Hence magnitude response of this filter is 1 and phase response is -pi/2 for f > 0 and pi/2 for f < 0. Hence phase response curve is like a staircase function (...

true or false?

unit step function u(t) does not contain any transient signal

hi, i want to stick 4 fibers of outer diameter 200 microns each ( with their jackets peeled off) together in perfect square geometry. How it can be done?

which equation can be used to know the image size formed by a thick lens e.g. I want to know the height of the image formed of an object 0.03 cm high. Which equation can be used

how F-number of a lens and spherical aberration are related?