연습해보는 곳
http://bomber0.byus.net/mimetex/mimetex.cgi?\frac{az+b}{cz+d}
http://bomber0.byus.net/mimetex/mimetex.cgi?ad-bc \neq 0
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\leftarrow | − |
\longleftarrow |  |
\uparrow |
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\Leftarrow | = |
\Longleftarrow |  |
\Uparrow |
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\rightarriw | − |
\longrightarrow |  |
\downarrow |
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\Rightarrow | = |
\Longrightarrow |  |
\Downarrow |
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\leftrightarrow | |
\longleftrightarrow |  |
\updownarrow |
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\Leftrightarrow | |
\Longleftrightarrow |  |
\Updownarrow |
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\mapsto | − |
\longmapsto |  |
\nearrow |
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\hookleftarrow |  |
\hookrightarrow |  |
\searrow |
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\leftharpoonup |  |
\rightharpoonup |  |
\swarrow |
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\leftharpoondown |  |
\rightharpoondown |  |
\nwarrow |
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\rightleftharpoons |