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vtype
uc()
(_0
, _1
, _2
, ... etc.)
sin(x)
, log(a+1)
, acosh(1)
, @pi
, @e
, ... etc.)
sin
, log
, ... etc)
a();
' will cause an error, but it changes
the system database for identifiers. After this error, you will find
`vtype(a)
' will result 3. (Identifier a
is registered as
a user defined functor).
@pi
and @e
are treated as indeterminates,
whereas they are treated as numbers within functions eval()
and
pari()
.
type
, 6.8.2 ntype
, 6.3.3 uc
.