A Theory of Time And Space
A Theory of Time And Space
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In our eReader you can find the full English version of the book. Read A Theory of Time And Space Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Theory of Time And Space
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222 A THEORY OF TIME AND SPACE But, as in Theorem 144, OB is normal to a and thus OB is normal to the two intersecting general lines a and b which lie in P and there- fore it is normal to P. - Again if B' be any element in P which does not lie in 6, then BB' is a separation line and so as in Theorem 144 OB' cannot be normal to P.
Thus all general lines through normal to P which have an element in common with P intersect b.
Thus the first part of the theorem is proved.
Suppose next that is befor...e some element, say E, in P.
Then through E one single generator of P passes which we may denote by /.
Since does not lie in / but is before an element of /, it follows that through there is an optical line which is a before-parallel of / and which we shall denote by c.
If f be any other generator of P it will be a neutral-parallel of / and so by Theorem 25 (a) c will be a before-parallel of /'.
Thus is before elements of every generator of P.
Similarly if be after any element of P it is after elements of every generator of P.
What to read after A Theory of Time And Space?
You can find similar books in the "Read Also" column, or choose other free books by Alfred a Alfred Arthur Robb to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
222 A THEORY OF TIME AND SPACE But, as in Theorem 144, OB is normal to a and thus OB is normal to the two intersecting general lines a and b which lie in P and there- fore it is normal to P. - Again if B' be any element in P which does not lie in 6, then BB' is a separation line and so as in Theorem 144 OB' cannot be normal to P.
Thus all general lines through normal to P which have an element in common with P intersect b.
Thus the first part of the theorem is proved.
Suppose next that is befor...e some element, say E, in P.
Then through E one single generator of P passes which we may denote by /.
Since does not lie in / but is before an element of /, it follows that through there is an optical line which is a before-parallel of / and which we shall denote by c.
If f be any other generator of P it will be a neutral-parallel of / and so by Theorem 25 (a) c will be a before-parallel of /'.
Thus is before elements of every generator of P.
Similarly if be after any element of P it is after elements of every generator of P.
What to read after A Theory of Time And Space?
You can find similar books in the "Read Also" column, or choose other free books by Alfred a Alfred Arthur Robb to read onlineMoreLess
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