Function: first (<expr>) Returns the first part of <expr> which may result in the first element of a list, the first row of a matrix, the first term of a sum, etc. Note that
first and its related functions,
last, work on the form of <expr> which is displayed not the form which is typed on input. If the variable
inflag is set to
true however, these functions will look at the internal form of <expr>. Note that the simplifier re-orders expressions. Thus
first(x+y) will be
first(y+x) gives the same results). The functions
tenth yield the second through the tenth part of their input argument.
There are also some inexact matches for
?? first to see them.
(%o1) true (%i2)
eq_v1: i_oa1 + (gc3*(...