Examples of using Expr in English and their translations into German
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Computer
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Programming
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Colloquial
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Official
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Ecclesiastic
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Medicine
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Financial
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Ecclesiastic
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Political
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Official/political
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Political
Caller expr.
If(expr) statement.
Matches regular expr.
Expr is not otherwise modified.
Does not match reg. expr.
Function: taylorinfo(expr) Returns information about the Taylor series expr.
The syntax still uses the deprecated infix style\music expr\.
Function: oddp(expr) Returns true if expr is a literal odd integer.
Here is an example of micro-tailoring where Question Type=='expr' means an Equation.
T,--exclude-trees=expr Consider onlypackages in trees not matching expr.
Expandwrt_factored expands only on those factors of expr that contain the variables x_1,…, x_n.
Function: floatnump(expr) Returns true if expr is a floating point number.
  Expressions Function: substinpart(x, expr, n_1,…, n_k) Similar to substpart, but substinpart works on the internal representation of expr.
The return value of ratexpand is a general expression, even if expr is a canonical rational expression CRE.
Function: ev(expr, arg_1,…, arg_n) Evaluates the expression expr in the environment specified by the arguments arg_1,…, arg_n.
If the upper and lower limits differ by an integer,the summand expr is evaluated for each value of the summation index i, and the result is an explicit sum.
Set number[expr$number+ 24.5] 70.125% string range$number 2 5 .125 With the command expr, the value of the variable number was increased 24.5.
Note that because of the rules for evaluation of predicate expressions(in particular because not expr causes evaluation of expr), not a b is equivalent to is(a b), instead of a b.
If expr is already in canonical rational expression(CRE) form when modulus is reset, then you may need to re-rat expr, e.g., expr.
Orderlessp returns true if expr_1 precedes expr_2 in the canonical ordering of Maxima expressions, and false otherwise.
Function: isolate(expr, x) Returns expr with subexpressions which are sums and which do not contain var replaced by intermediate expression labels these being atomic symbols like %t1, %t2,….
Note that any function calls in expr will be carried out after the variables in it are evaluated and that ev(F(x)) thus may behave like Fevx.
Function: ratsimp(expr) Function: ratsimp(expr, x_1,…, x_n) Simplifies the expression expr and all of its subexpressions, including the arguments to non-rational functions.
Function: lopow(expr, x)Returns the lowest exponent of x which explicitly appears in expr.
Function: macroexpand1(expr) Returns the macro expansion of expr without evaluating it, when expr is a macro function call.
Function: zeroequiv(expr, v) Tests whether the expression expr in the variable v is equivalent to zero, returning true, false, or dontknow.
Rearranges the sum expr into a sum of terms of the form f(x_1, x_2,…)*g where g is a product of expressions not containing any x_i and f is factored.
Function: substpart(x, expr, n_1,…, n_k) Substitutes x for the subexpression picked out by the rest of the arguments as in part.
Function: rationalize(expr) Convert all double floats and big floats in the Maxima expression expr to their exact rational equivalents.
Function: flatten(expr)Collects arguments of subexpressions which have the same operator as expr and constructs an expression from these collected arguments.