| |
|
|
|
|
|
|
|
|
1. |
Record Nr. |
UNINA9910715979503321 |
|
|
Autore |
Crutchfield Stephen R. |
|
|
Titolo |
Benefits of safer drinking water : the value of nitrate reduction / / Stephen R. Crutchfield, Joseph C. Cooper, Daniel Hellerstein |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Washington, DC : , : United States Department of Agriculture, Economic Research Service, , 1997 |
|
|
|
|
|
|
|
|
|
Descrizione fisica |
|
1 online resource (iii, 15 pages) : illustrations |
|
|
|
|
|
|
Collana |
|
Agricultural economic report ; ; no. 752 |
|
|
|
|
|
|
Soggetti |
|
Water quality - United States |
Drinking water - Purification - United States |
Nitrates |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Note generali |
|
|
|
|
|
|
Nota di bibliografia |
|
Includes bibliographical references. |
|
|
|
|
|
|
|
|
|
|
|
|
|
2. |
Record Nr. |
UNINA9910818932503321 |
|
|
Autore |
Makkai Mihály <1939-> |
|
|
Titolo |
Duality and definability in first order logic / / Michael Makkai |
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Providence, Rhode Island : , : American Mathematical Society, , 1993 |
|
©1993 |
|
|
|
|
|
|
|
|
|
ISBN |
|
|
|
|
|
|
Descrizione fisica |
|
1 online resource (122 p.) |
|
|
|
|
|
|
Collana |
|
Memoirs of the American Mathematical Society, , 0065-9266 ; ; Volume 105, Number 503 |
|
|
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
Soggetti |
|
First-order logic |
Duality theory (Mathematics) |
Toposes |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Note generali |
|
"September 1993, Volume 105, Number 503 (fourth of 6 numbers)." |
|
|
|
|
|
|
Nota di bibliografia |
|
Includes bibliographical references. |
|
|
|
|
|
|
Nota di contenuto |
|
""Table Of Contents""; ""Abstract""; ""Introduction""; ""1. Beth's theorem for propositional logic""; ""2. Factorizations in 2-categories""; ""3. Definable functors""; ""4. Basic notions for duality""; ""5. The Stone-type adjunction for Boolean pretoposes and ultragroupoids""; ""6. The syntax of special ultramorphisms""; ""7. The semantics of special ultramorphisms""; ""8. The duality theorem""; ""9. Preparing a functor specification""; ""10. Lifting Zawadowski's argument to ultra*morphisms""; ""11. The operations in BP* and UG""; ""12. Conclusion""; ""References"" |
|
|
|
|
|
|
|
| |