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The Maxima on-line user's manual

Algebra Calculator

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Del Calculator

Del

Function: del (<x>) del (<x>) represents the differential of the variable x.

diff(sin(x/a),del(x));

diff returns an expression containing del if an independent variable is not specified. In this case, the return value is the so-called "total differential".

Examples:

          (%i1) diff (log (x));
                                       del(x)
          (%o1)                        ------
                                         x
          (%i2) diff (exp (x*y));
                               x y              x y
          (%o2)            x %e    del(y) + y %e    del(x)
          (%i3) diff (x*y*z);
          (%o3)         x y del(z) + x z del(y) + y z del(x)

There are also some inexact matches for del. Try ?? del to see them.

(%o1)                                true
(%i2) 

Del Example

Related Examples

del-diff-part-random-substpart

? del;

signs:["+","-","*","/"];

a1:random(8);

Calculate

del

del(x)*del(y) + del(y...

Calculate

del

del(x)*del(y) + del(x...

Calculate

del-diff

f(x,y) := (x-y)*(1-x*y);

diff (f);

del(y);

Calculate

del-ode2

ode2(del(y)/del(x) = ...

Calculate

del-diff

f(x,y) := (x-y)*(1-x*y);

diff (f);

del(y);

Calculate

del

ve([S(t)=S(t-del)/(1+...

Calculate

del

S(t)=S(t-del)/(1+B*I(...

I(t)=I(t-del)/(1-del*...

R(t)=(del*I(t))+R(t-d...

Calculate

del

del(x)*del(y) + del(x);

Calculate