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Derivative of vector dot product with respect to a vector

Version 14.1 introduced VectorSymbol, which allows symbolic calculations with vectors: ...
• 29.1k

Comparing Mathematica expressions like diff

In version 14.1, there is a new function called Diff. It's not the solution to your problem, but it might still be useful to some. It doesn't compare expressions in ...
• 29.1k
Accepted

Try this: ...
• 39.8k
1 vote

Find combinations of this set that verify condition

Just to illustrate Reap and Sow ...
• 62.9k

Find combinations of this set that verify condition

expr[{a_, b_, c_, d_, e_}] := 3 Sqrt[87.3047 a^2 + 55.3027 b^2 + 3.19092 c^2 + 1.36097 d^2 + 1.09369 e^2] tol = {0.2, 0.1, 0.05, 0.03, 0.02, 0.01}; Using ...
• 82.2k

Ignore higher order terms in an expression

expr = α β + α^2 + β^2 + α β^2/2 + α^2 β; vars = {α, β}; Another way is to use PolynomialDegree by Dennis M Schneider and ...
• 28.3k

Ignore higher order terms in an expression

Assuming the parts of the expression will consist of things that look like $\alpha ^i \beta^j$ for non-negative $i , j$ We can also use Select: ...
• 4,657
Accepted

Ignore higher order terms in an expression

Rules do not understand mathematics, they understand structures of expressions. So, without help, they don't understand that in $\alpha^2\beta$ you can read it as $\alpha^2\beta^1$, and therefore ...
• 6,276