5 ideas
21757 | Philosophy is the conceptual essence of the shape of history [Hegel] |
10245 | One geometry cannot be more true than another [Poincaré] |
18253 | I wish to go straight from cardinals to reals (as ratios), leaving out the rationals [Frege] |
18166 | The loss of my Rule V seems to make foundations for arithmetic impossible [Frege] |
18269 | Logical objects are extensions of concepts, or ranges of values of functions [Frege] |