Suppose the state of the world is described by $n$ labeled propositions, and that the state is constrained by a set of 0 or more implications of the form (all of $S$ are true) implies (a proposition not appearing in $S$), where $S$ is a collection of one or more propositions. Two sets of implicat...
I'm reading a book named "Geometry, A comprehensive course" by Dan Pedoe at the moment. But I don't understand when they talk about the equation of a straight line... Here is what is written: The lines of our plane are sets of points which satisfy equations of the form $$a_1X_1+a_2X_2+a_3=0$...
There is relatively new tag straight-lines. We have previously discussed the tags line (or lines) and planes and the consensus was that the tags are not needed: Tags for lines and planes? Should the tag straight-lines be removed too? To add more details, the tag was created a few days ago. Since...
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