Return the sum of sum(res.y)
Tip: use bvp4c
Find all elements less than 0 or greater than 10 and replace them with NaN
Determine if a Given Number is a Triangle Number
Back to basics 23 - Triangular matrix
create a circulant matrix
Basics: Divide integers to get integer outputs in all cases
Solve the system of equations.
Create cotangent function out of sine.
Calculate the centroid of a triangle
Solve the following system of equations.
Find the sum of the negative elements under the main diagonal.
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