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MathGroup Archive 2007

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unexpected (?) appearance of Function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74001] unexpected (?) appearance of Function
  • From: "dimitris" <dimmechan at yahoo.com>
  • Date: Mon, 5 Mar 2007 04:52:19 -0500 (EST)

Hello to all.

"Hanging around" with Chris Chiasson's code...

In[15]:=
Developer`ClearCache[]
Block[{$Output = {OpenWrite["C:\\msgStream.m"]}},
TracePrint[NIntegrate[Log[x]/x^2, {x, 1, Infinity}], TraceInternal ->
True];
    Close /@ $Output];
Thread[Union[Cases[ReadList["C:\\msgStream.m",
HoldComplete[Expression]],
    symb_Symbol /; AtomQ[Unevaluated[symb]] &&
Context[Unevaluated[symb]] === "System`" :> HoldComplete[symb], {0,
Infinity},
    Heads -> True]], HoldComplete]

Out[17]=
HoldComplete[{AccuracyGoal, Automatic, Blank, Compiled,
EvaluationMonitor, ExcludedForms, GaussPoints, HoldComplete,
HoldForm,
   Infinity, List, Log, MachinePrecision, MaxPoints, MaxRecursion,
Method, MinRecursion, NIntegrate, None, Null,
   OptimizationLevel, Power, PrecisionGoal, Rule, Set,
SingularityDepth, Times, True, Unset, WorkingPrecision, $,
$MessageList}]


Can somebody explain me the appearance of  ExcludedForms ( an option
for FullSimplify!) here in
an numerical integation?

Thanks a lot!



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