27 июл. 2017 г. · It still means 'therefore'. Sometimes a line is drawn under the premises to signal the end of the premises and say 'and now comes the conclusion'. |
13 апр. 2017 г. · This symbol just means 'because'. If it was facing up, it means 'therefore'. Kinda feel like this is too short but I guess there's not much to this question. |
6 сент. 2018 г. · In classic propositional logic, I think it usually takes on the following form: p→q, where p is the premise and q is the conclusion. |
16 нояб. 2012 г. · It seems like ∴ is more frequently used when reaching the conclusion of an argument, while ⟹ is for intermediate claims that imply each other. |
3 мар. 2019 г. · The symbol ∴ means “therefore”. |
22 янв. 2015 г. · Both symbols can be used in the metatheory, meaning that they are used to describe properties and relations between objects of the theory. |
14 мар. 2014 г. · Typically this ∴ means "therefore" and this ⟹ means "implies". |
6 нояб. 2013 г. · @Shaun, a⊬b means "Given a, we cannot prove b." Modus ponens can be written a,a⟹b⊢b. However, ¬a,a⟹b⊬b. |
7 июл. 2015 г. · I happen to have some notes on this, perhaps they help: Given n-equations in (m+n)-unknowns when can we solve for the last n-variables as ... |
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