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User:Jon Awbrey/SCRATCHPAD (view source)
Revision as of 18:05, 31 January 2009
, 18:05, 31 January 2009→Definition 7
D7b. [S] = [T].
D7b. [S] = [T].
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{| align="center" cellpadding="0" cellspacing="0" width="100%"
|- style="height:40px; text-align:center"
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| width="20%" | <math>\text{Definition 7}\!</math>
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|- style="height:40px"
| width="2%" style="border-top:1px solid black" |
| width="18%" style="border-top:1px solid black" | <math>\text{If}\!</math>
| width="80%" style="border-top:1px solid black" | <math>s, t ~\text{are sentences about things in the universe}~ X</math>
|- style="height:40px"
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| <math>\text{then}\!</math>
| <math>\text{the following are equivalent:}\!</math>
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|- style="height:40px"
| width="2%" style="border-top:1px solid black" |
| width="18%" style="border-top:1px solid black" | <math>\operatorname{D7a.}</math>
| width="80%" style="border-top:1px solid black" | <math>s ~\Leftrightarrow~ t</math>
|- style="height:40px"
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| <math>\operatorname{D7b.}</math>
| <math>\downharpoonleft s \downharpoonright ~=~ \downharpoonleft t \downharpoonright</math>
|}
|}
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===Rule 5===
===Rule 5===