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...:<center><math>\mathbf{i}^2=\mathbf{j}^2=\mathbf{k}^2=\mathbf{i\,j\,k}=-1</math></center>]] :<math>a + b\ \mathbf i + c\ \mathbf j +d\ \mathbf k</math> ...

...e measure relations of space in the infinitely small are not in accordance with the assumptions of our geometry [Euclidean geometry], and, in fact, we shou ...and distances, which alone are accessible to observation (can be compared with experience). ...

...on-empirical science par excellence, wherein the mind appears to play only with itself, that turned out to be the science of sciences, delivering the key t ...on-empirical science par excellence, wherein the mind appears to play only with itself, that turned out to be the science of sciences, delivering the key t ...

:'''Ms. Porter''': OK, Nicole, I have here a map of the world with all of the countries' names removed. Would you please point out to the clas ...eography teacher, assigned it. She said the class needs to be more in tune with what is happening in the world so she has asked us to read the newspaper fo ...

* The history of mathematics cannot with certainty be traced back to any school or period before that of the [[w:Ion ...s ''Geometry'', the latter of which he managed to master by himself though with some difficulty. The interest he felt in the subject led him to take up mat ...