# Math

## Block Math

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$$
.
<p>$$</p>
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$$
\operatorname{ker} f=\{g\in G:f(g)=e_{H}\}{\mbox{.}}
$$
.
<div class="math">$$
\operatorname{ker} f=\{g\in G:f(g)=e_{H}\}{\mbox{.}}
$$</div>
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```````````````````````````````` example
$$
foo
$$
bar
.
<div class="math">$$
foo
$$</div>
<p>bar</p>
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```````````````````````````````` example
$$
foo
bar
$$
.
<div class="math">$$
foo
bar
$$</div>
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## Inline Math

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The homomorphism $f$ is injective if and only if its kernel is only the
singleton set $e_G$, because otherwise $\exists a,b\in G$
with $a\neq b$ such that $f(a)=f(b)$.
.
<p>The homomorphism <span class="math">\(f\)</span> is injective if and only if its kernel is only the
singleton set <span class="math">\(e_G\)</span>, because otherwise <span class="math">\(\exists a,b\in G\)</span>
with <span class="math">\(a\neq b\)</span> such that <span class="math">\(f(a)=f(b)\)</span>.</p>
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