using the Kronecker product and vec operators to write the following least squares problem in standard matrix form

Closest point on a line to another point

Why teach linear algebra before abstract algebra?

If $A,B$ have eigenvalues $\pm1$, what can I say about the eigenvalues of $AB,BA$?

How to find continued fraction of pi

How to calculate the percentage of increase/decrease with negative numbers?

Derivative of definite integral

Proof Verification - Every sequence in $\Bbb R$ contains a monotone sub-sequence

Finding nonnegative solutions to an underdetermined linear system

there exist two antipodal points on the equator that have the same temperature.

A contractible space is path connected.

Find the value of the integral $\int_0^1\int_0^1e^{\max(x^2,y^2)}dxdy$

understanding of the first fundamental form

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