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Summary
| Description |
English: Shows a part of the subsumption lattice, demonstrating that the terms f(a,x), f(x,x), and f(x,c), do not have a common instance other than the bottom term Ω (introduced by Reynolds to indicate non-unifiability), although each two of them are syntactically unifiable. The setting assumes that f is a binary function symbol (omitted in the picture), a and c are constants, and x and y are variables. All involved terms term have f(x,y) as a common upper bound; all its instances by variables or constants are shown, the relevant ones highlighted in red. |
| Date | |
| Source | Own work |
| Author | Jochen Burghardt |
Licensing
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:32, 9 September 2014 | | 873 × 456 (7 KB) | Jochen Burghardt | Much simpler example; full term hierarchy can be shown for it. |
| 20:34, 20 August 2014 |  | 1,225 × 561 (10 KB) | Jochen Burghardt | {{Information |Description ={{en|1=pairwise unifiable terms}} |Source ={{own}} |Author =Jochen Burghardt |Date =2014-08-20 |Permission = |other_versions = }} |
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