8 lines
437 B
HTML
8 lines
437 B
HTML
<h2 id="fix-composition-12">Fix Composition (1/2)</h2>
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<p>Goal, find: <code>◎ :: (b -> F c) -> (a -> F b) -> (a -> F c)</code><br /><code>f :: a -> F b</code>, <code>g :: b -> F c</code>:</p>
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<ul>
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<li><code>(g ◎ f) x</code> ???</li>
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<li>First apply <code>f</code> to <code>x</code> ⇒ <code>f x :: F b</code></li>
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<li>Then how to apply <code>g</code> properly to an element of type <code>F b</code>?</li>
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</ul>
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