10 lines
451 B
HTML
10 lines
451 B
HTML
<h2>Degenerated Categories: Monoids</h2>
|
|
|
|
<img class="right" style="max-width:17%" src="categories/img/mp/monoid.png" alt="Monoids are one object categories"/>
|
|
<p>Each Monoid \((M,e,⊙): \ob{M}=\{∙\},\hom{M}=M,\circ = ⊙\)</p>
|
|
<p class="yellow">Only one object.</p>
|
|
<p>Examples:</p>
|
|
<ul><li><code>(Integer,0,+)</code>, <code>(Integer,1,*)</code>,
|
|
</li><li><code>(Strings,"",++)</code>, for each <code>a</code>, <code>([a],[],++)</code>
|
|
</li></ul>
|