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| ''e''<sub>1</sub> ''e''<sub>2</sub> ''e''<sub>3</sub>
 
| ''e''<sub>1</sub> ''e''<sub>2</sub> ''e''<sub>3</sub>
 
| means
 
| means
| ''e''<sub>1</sub> and ''e''<sub>2</sub> and ''e''<sub>3</sub>.
+
| ''e''<sub>1</sub> and ''e''<sub>2</sub> and ''e''<sub>3</sub> .
 
|}
 
|}
   Line 635: Line 635:  
| (''e''<sub>1</sub>)
 
| (''e''<sub>1</sub>)
 
| means
 
| means
| not ''e''<sub>1</sub>.
+
| not ''e''<sub>1</sub> .
 
| &nbsp;
 
| &nbsp;
 
|-
 
|-
| (''e''<sub>1</sub>, ''e''<sub>2</sub>)
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| (''e''<sub>1</sub> , ''e''<sub>2</sub>)
 
| means
 
| means
| ''e''<sub>1</sub> xor ''e''<sub>2</sub>,
+
| ''e''<sub>1</sub> xor ''e''<sub>2</sub> ,
| ''e''<sub>1</sub> + ''e''<sub>2</sub>,
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| ''e''<sub>1</sub> + ''e''<sub>2</sub> ,
 
|-
 
|-
 
| &nbsp;
 
| &nbsp;
 
| or
 
| or
| ''e''<sub>1</sub> neq ''e''<sub>2</sub>,
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| ''e''<sub>1</sub> neq ''e''<sub>2</sub> ,
| ''e''<sub>1</sub> &ne; ''e''<sub>2</sub>.
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| ''e''<sub>1</sub> &ne; ''e''<sub>2</sub> .
 
|}
 
|}
    
A remaining sample of typical expressions will finish illustrating the use of this calculus.
 
A remaining sample of typical expressions will finish illustrating the use of this calculus.
   −
<pre>
+
:{| cellpadding="4"
(e1 (e2)) means "e1 => e2",
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| (''e''<sub>1</sub> (''e''<sub>2</sub>))
 
+
| means
  or "if e1 then e2",
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| ''e''<sub>1</sub> &rArr; ''e''<sub>2</sub> ,
 
+
|-
  or "not e1 without e2".
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| &nbsp;
 
+
| i.e.
((e1)(e2)(e3)) means "e1 or e2 or e3".
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| if ''e''<sub>1</sub> then ''e''<sub>2</sub> ,
 
+
|-
(e1,(e2,e3)) means "e1 + e2 + e3".
+
| &nbsp;
</pre>
+
| i.e.
 +
| not ''e''<sub>1</sub> without ''e''<sub>2</sub> .
 +
|-
 +
| ((''e''<sub>1</sub>)(''e''<sub>2</sub>)(''e''<sub>3</sub>))
 +
| means
 +
| ''e''<sub>1</sub> or ''e''<sub>2</sub> or ''e''<sub>3</sub> .
 +
|-
 +
| (''e''<sub>1</sub> , (''e''<sub>2</sub> , ''e''<sub>3</sub>))
 +
| means
 +
| ''e''<sub>1</sub> + ''e''<sub>2</sub> + ''e''<sub>3</sub> .
 +
|}
    
=====3.1.1.2.  Partitions : Genus and Species=====
 
=====3.1.1.2.  Partitions : Genus and Species=====
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