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$\begingroup$ Does this also explain why Cases[Erfc[b], _Erfc, Infinity] gives {}? $\endgroup$

Mikael Fremling
– Mikael Fremling

2021-04-30 13:31:36 +00:00
Commented Apr 30, 2021 at 13:31
$\begingroup$ @MikaelFremling, no, this seems to be related to expression Head being a symbol, see the edit, not sure why $\endgroup$

I.M.
– I.M.

2021-04-30 15:31:36 +00:00
Commented Apr 30, 2021 at 15:31
2

$\begingroup$ @MikaelFremling Try Cases[Erfc[b], _Erfc, {0, Infinity}]. The level spec Infinity is equivalent to {1, Infinity}. $\endgroup$

Michael E2
– Michael E2

2021-04-30 16:46:04 +00:00
Commented Apr 30, 2021 at 16:46

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