Read More
Date: 17-2-2022
1053
Date: 14-2-2022
605
Date: 22-1-2022
1717
|
Let be a relational system, and let be a language which is appropriate for . Let be a well-formed formula of , and let be a valuation in . Then is written provided that one of the following holds:
1. is of the form , for some variables and of , and maps and to the same element of the structure .
2. is of the form , for some -ary predicate symbol of the language , and some variables of , and is a member of .
3. is of the form , for some formulas and of such that and .
4. is of the form , and there is an element of such that .
In this case, is said to satisfy with the valuation .
Bell, J. L. and Slomson, A. B. Models and Ultraproducts: an Introduction. Amsterdam, Netherlands: North-Holland, 1969.
Enderton, H. E. A Mathematical Introduction to Logic. Boston, MA: Academic Press, 1972.
|
|
دراسة تحدد أفضل 4 وجبات صحية.. وأخطرها
|
|
|
|
|
جامعة الكفيل تحتفي بذكرى ولادة الإمام محمد الجواد (عليه السلام)
|
|
|