### The Maxima on-line user's manual

Algebra Calculator

#### Simp

-- Option variable: simp Default value: `true`

`simp` enables simplification. This is the standard. `simp` is also an `evflag`, which is recognized by the function `ev`. See `ev`.

When `simp` is used as an `evflag` with a value `false`, the simplification is suppressed only during the evaluation phase of an expression. The flag can not suppress the simplification which follows the evaluation phase.

Examples:

The simplification is switched off globally. The expression `sin(1.0)` is not simplified to its numerical value. The `simp`-flag switches the simplification on.

```          (%i1) simp:false;
(%o1)                                false
(%i2) sin(1.0);
(%o2)                              sin(1.0)
(%i3) sin(1.0),simp;
(%o3)                          .8414709848078965```

The simplification is switched on again. The `simp`-flag cannot suppress the simplification completely. The output shows a simplified expression, but the variable `x` has an unsimplified expression as a value, because the assignment has occurred during the evaluation phase of the expression.

```          (%i4) simp:true;
(%o4)                                true
(%i5) x:sin(1.0),simp:false;
(%o5)                          .8414709848078965
(%i6) :lisp \$X
((%SIN) 1.0)```

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

```(%o1)                                true
(%i2) ```

### Related Examples

##### simp

(a+b)*(a-b),simp;

Calculate

##### simp-true

1/7, simp : true ;

Calculate

##### simp-sin

y * (- 0.029671141437...

Calculate

##### simp

e1: x1 = a0 * x0 + b0;

e2: x2 = a1 * x1 + b1;

x2, simp;

Calculate

##### simp-true

1/7, simp : true ;

Calculate

##### simp

simp:trux/(x^2-x^y)-y...

Calculate

(6+sqrt(52))/8;

6/8+sqrt(52)/8;

simp:true;

Calculate

##### simp-sort-true

simp:true;

p:y^3-2*y^2-8*y;

unary_minus_sort(p);

Calculate

##### simp-solve

p1:a^2 + 3^2 = b^2+4^2;

p2:(s-a)^2+3^2=c^2+5^2;

p3:(s-b)^2+4^2=(s-c)^...

Calculate

##### simp

e(x,y) := x^2 + (x+1)...

e(x,y),expand,simp;

e(2*u,y),expand,simp;

Calculate