[Maxima] limit of erfc
toy.raymond at gmail.com
Thu May 17 10:53:22 CDT 2012
I noticed when running just the rtest_gamma test, I get two failures:
limit(erfc(z),z,inf) and limit(erfc(z),z,minf). This doesn't happen when I
run the entire testsuite. I guess something is leaking into rtest_gamma
from earlier tests.
However, from a fresh maxima session, maxima cannot determine
limit(erfc(z),z,inf). But maxima knows limit(erf(z),z,inf) = 1.
Also, erf(inf) -> 1, erfc(inf) -> 0, erf(minf) -> -1, erfc(minf) -> 2. Why
is that? Compare what happens with tanh(inf) which just returns the noun
form. Also, sinh(inf) -> sinh(inf).
It seems a bug that maxima does not know what limit(erfc(z),z,inf) is.
But what about erf(inf) -> 1 instead of a noun form?
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