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The Talmud (AZ 27b) and in the Tosfot talks about the issur to frequent the מינים and to cure by them:

לא ישא ויתן אדם עם המינים ואין מתרפאין מהן אפילו לחיי שעה וכו' שאני מינות דמשכא דאתי לממשך בתרייהו וכו'

Is another benefit permitted? For example, to receive a gift from him? Or the man became like an איסור הנאה , a דרבנן extension to the issur to benefit from an avoda zara?

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    On what basis do you suspect that learning mathematics could be forbidden? Tosafot discusses interacting with heretics yourself. He states absolutely nothing about benefiting from an idea thought of by a person who may have learned from a theologian.
    – mevaqesh
    Feb 16 '17 at 20:16
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    is a mathematical concept, a man's creation, or he just was who Hashem choose to discover one of His world's rules?... This seems like a subjective question of semantics, that is really unanswerable. A much better question would be whether learning mathematics is included in the statement of Tosafot. (On the basis of my previous comment I cannot fathom how it might be).
    – mevaqesh
    Feb 16 '17 at 20:17
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    microscopic micro-organismes are not an invention of the man who invented microscope
    – kouty
    Feb 16 '17 at 21:50
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    Why not just prove the theorems yourself and rename them after Gedolim?
    – Double AA
    Feb 19 '17 at 19:11
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    Re "But, now, the theorem is called on the name of the מין": nota, many theorems in mathematics are named after someone who proved them not first.
    – msh210
    Feb 20 '17 at 21:11
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Igros Moshe Even HaEzer (1:96) (not on Hebrewbooks) says that it makes sense to say that only about holy things (like writing a Sefer Torah) there is a decree against "leaving a name for the wicked (meaning Apikorsim - heretics)".

Therefore, one's allowed to use and call medical or mechanical inventions after them.

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    Therefore, one's allowed to use and call medical or mechanical inventions after them. This seems to say one may use an item named after them, or name an item after them. Are you saying that one may use an item invented by them? If not, I don't see how this related to the OP.
    – mevaqesh
    Feb 19 '17 at 20:25
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    Shmuel, is there any more info on the teshuvah which is relevant, for those of us without an Igros Moshe? Feb 20 '17 at 18:31
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    @yO_ The line in the answer is poorly worded, and should be improved regardless If you happen to be familiar with the IGM and know that intent, that doesn't change that.
    – mevaqesh
    Feb 20 '17 at 19:02
  • I assume Rav Moshe wrote in lucid Hebrew, rather than less than coherent English. One doesn't use an invention after somebody. | I therefore asked for clarification of whether he meant use an invention made by somebody @yO_
    – mevaqesh
    Feb 22 '17 at 21:57
  • @mevaqesh added scan Feb 23 '17 at 2:56

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