| Line 627: | Line 627: | 
|  | | ''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> . | 
|  | |   |  | |   | 
|  | |- |  | |- | 
| − | | (''e''<sub>1</sub>, ''e''<sub>2</sub>) | + | | (''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>, | + | | ''e''<sub>1</sub> + ''e''<sub>2</sub> , | 
|  | |- |  | |- | 
|  | |   |  | |   | 
|  | | or |  | | or | 
| − | | ''e''<sub>1</sub> neq ''e''<sub>2</sub>, | + | | ''e''<sub>1</sub> neq ''e''<sub>2</sub> , | 
| − | | ''e''<sub>1</sub> ≠ ''e''<sub>2</sub>. | + | | ''e''<sub>1</sub> ≠ ''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",
 | + | | (''e''<sub>1</sub> (''e''<sub>2</sub>)) | 
| − |   | + | | means | 
| − | 			  or	"ife1 thene2",
 | + | | ''e''<sub>1</sub> ⇒ ''e''<sub>2</sub> , | 
| − |   | + | |- | 
| − | 			  or	"note1 withoute2".
 | + | |   | 
| − |   | + | | i.e. | 
| − | 	((e1)(e2)(e3))	means"e1 ore2 ore3".
 | + | | if ''e''<sub>1</sub> then ''e''<sub>2</sub> , | 
| − |   | + | |- | 
| − | 	(e1,(e2,e3))	means"e1 +e2 +e3".
 | + | |   | 
| − | </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===== |