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Feb
5
comment Not getting dot product of Eigen vectors in MATLAB aslo in LAPACK to zeros
Can you post the output that you are getting? That will help us to identify what the issue is. Also include the code that you used as that will be helpful also.
Jan
27
comment How to calculate area integral for unequally-spaced data
Depending on the form of $f$ (known at all points or a discrete set), you could use your favourite technique on each triangle of interest and sum the results.
Jan
4
comment How to find the equidistant middle point for 3+ points on an arbitrary polygon?
For three people, it will be the centre of the circle that passes through the three points. For four or more people, it will not always be possible. E.g. People at (1,0), (0,1), (0,0), (-1,-1). For any three of these people, you can find the point that is equidistant to them all, but the fourth person will not be the same distance from that point.
Nov
21
comment Find the limit of the vector as t approaches 0?
Yes. You just take the limit of each component.
Oct
21
comment Intuitive understanding of the -b in this definition of a plane
Hint: A plane that doesn't pass through the origin is written $n\cdot (x-p)=0$, where $p$ is any point on the plane.
Oct
14
reviewed Approve Solving a system of equations - minimizing f
Aug
3
reviewed Approve Do the initial value problem $dy/dx=2y^{1/2}$ , y(0)=a has infinitely many solution for a=0.
Jul
18
awarded  Yearling
Jul
10
awarded  Popular Question
Jun
28
reviewed Approve What is the inverse of $2^x$?
Jun
27
reviewed Approve What does cross product mean in simple words?
Jun
27
answered Linear Algebra: Nullity and Invertibility
May
7
reviewed Approve Verification that $\int x\sin x=\sin x- x\cos x + C$ by differentiating both sides of the equation
Apr
11
comment Solve the differential equation using Taylor-series expansion
@Algohi I don't think it has a name. Googling "solve differential equation with Taylor series" brings up a few results you might find helpful.
Mar
28
comment Least norm solution to $Ax = b$
@mining If $A$ doesn't have full row rank, there are redundant constraints. As long as $b$ is in the column space of $A$ (i.e. $Ax=b$ is consistent), then the redundant constraints can be dropped so that $A$ has full for rank.
Mar
6
comment Matrix Multiplication in Maple
The standard manner I would use to multiply matrices is the dot operator; i.e. A.B; which should do the correct thing. I'm not sure why it would take so long to compute.
Mar
6
comment Matrix Multiplication in Maple
Is $B$ coming out as a column vector? Are you getting any error messages?
Mar
6
revised Matrix Multiplication in Maple
Fixed code block
Feb
12
awarded  Revival
Dec
23
reviewed Approve How much should I scale $dx$ and $dy$ individually to get a vector of required magnitude