<div dir="auto">I'm +1 on this, since it is conventional to write addition (and others) over function as such in most math textbooks.</div><br><div class="gmail_quote"><div dir="ltr">2018년 11월 11일 (일) 13:48에 Daniel Cartwright <<a href="mailto:chessai1996@gmail.com">chessai1996@gmail.com</a>>님이 작성:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">relevant reddit comment thread: <a href="https://www.reddit.com/r/haskell/comments/9vtis5/the_universe_of_discourse_i_hate_the_environment/e9f1lea?utm_source=reddit-android" target="_blank" rel="noreferrer">https://www.reddit.com/r/haskell/comments/9vtis5/the_universe_of_discourse_i_hate_the_environment/e9f1lea?utm_source=reddit-android</a><div dir="auto"><br></div><div dir="auto">instance Num b => Num (a -> b) where</div><div dir="auto">  f + g = \x -> f x + g x</div><div dir="auto">  f * g = \x -> f x * g x</div><div dir="auto">  f - g = \x -> f x - g x</div><div dir="auto">  negate f = \x -> negate (f x)</div><div dir="auto">  abs f = \x -> abs (f x)</div><div dir="auto">  signum f = \x -> signum (f x)</div><div dir="auto">  fromInteger i = \x -> fromInteger (f x)</div></div>
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