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Each point in <math>X\!</math> may be described by means of a ''singular proposition'', that is, a proposition that describes it uniquely.  This form of representation leads to the following enumeration of points:
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Each point in <math>X\!</math> may be indicated by means of a ''singular proposition'', that is, a proposition that describes it uniquely.  This form of representation leads to the following enumeration of points, presented in two different styles of typography that are used in this text:
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{| align="center" cellpadding="8" style="text-align:center"
| '''<math>X \quad = \quad \{\!</math>&nbsp;<code>(u)(v)</code>&nbsp;,&nbsp;<code>(u)v</code>&nbsp;,&nbsp; <code>u(v)</code>&nbsp;,&nbsp;<code>uv</code>&nbsp;<math>\} \quad \cong \quad \mathbb{B}^2.</math>'''
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| <math>X\!</math>
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| <math>=\!</math>
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| <math>\{\!</math>'''<font size="+1">&nbsp;<code>(u)(v)</code>,&nbsp;&nbsp;<code>(u)v</code>,&nbsp;&nbsp;<code>u(v)</code>,&nbsp;&nbsp;<code>uv</code>&nbsp;</font>'''<math>\}\!</math>
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| <math>\cong\!</math>
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| <math>\mathbb{B}^2,</math>
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|-
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| <math>X\!</math>
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| <math>=\!</math>
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| <math>\{\ \underline{(u)(v)},\ \underline{(u)v},\ \underline{u(v)},\ \underline{uv}\ \}</math>
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| <math>\cong\!</math>
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| <math>\mathbb{B}^2.</math>
 
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