"General::ivar: 0 is not a valid variable." after applying D (derivative)
18876
General::ivar is not a valid variable when plotting - what actually causes this and how to avoid it?
90780
Why does implicit differentiation work on non-functions?
2050
Multivariable Taylor expansion does not work as expected
151514
Trouble doing polynomial interpolation
71673
"Initializer is not a compile time constant" error works in .mm?
7423
"R cannot be resolved to a variable"?
16816
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
18565
Analogue for Maple's dchange - change of variables in differential expressions
127924
How to deal with an error such as "Coefficients: 14 not defined because of singularities" in R?
139530
Taking derivatives with respect to a matrix
110567
How to debug "contrasts can be applied only to factors with 2 or more levels" error?
140860
Variable substitution when integrating with Mathematica
5634
Neglect higher order derivatives in expression
90126
FunctionInterpolation error when specifying AccuracyGoal
110293
Underflow error General::munfl from E^x instead of Exp[x]
19611
error in python d not defined.
79822
Problems with partial derivatives.