Meteorite fallen in Iasi, Romania

|

On July 9, in Iaşi, a loud noise was heard as to be caused by the fall of a body from the sky. Silviu Gurlui, a professor at the Physics Faculty of Iasi, says that the shock was caused by … Read More

Henri Poincaré, The logic of infinity: The memory of Mr. Russel

|

Russell published in the American Journal of Mathematics, vol. XXX, under the title Mathematical Logics as Based on the Theory of Types, a memoir in which he relies on considerations quite similar to those which precede. After recalling some of … Read More

RETURN TO THE COUNTRY – SEE AGAIN THE PORA LAND AND DIE

|

Everything has its reverse! Certainly, I lived in the midst of the most beautiful nature that can be seen; but already two months had passed and not without disenchantment. I will never be able to give an exact account of … Read More

Henri Poincaré, The logic of infinity: The cardinal number

|

We must not forget the preceding considerations when defining the cardinal number. If we consider two collections, we may seek to establish a law of correspondence between the objects of these two collections, so that any object of the first … Read More

AUSTRALIA – MORE COUSINES

|

“Lovely luck! Here I am aboard, at the moment when I had no desire to embark! That’s fine, life is safe … but where are we going on this unknown ship? …..” Such was my monologue, hiding me as close … Read More

Henri Poincaré, The logic of infinity: What a classification must be

|

Can the ordinary rules of logic be applied without change, as soon as we consider collections taking an infinite number of objects? This is a question we did not ask at first, but we were led to examine when the … Read More

FLOOD, CHAIN, BALL – NAUFRAGE

|

We were together further than I expected. Orienting myself as best as I could, I returned straight to our beautiful anthill, when I met a deserted, mountainous, arid place, in which I had to run the greatest dangers. It was … Read More

Henri Poincaré, Why space with three dimensions – Analysis Situs and intuition

|

I would like to add a remark which relates only indirectly to the foregoing; we have seen above the importance of the Analysis Situs and I explained that this is the real domain of geometric intuition. Does this intuition exist? … Read More

The adventures of a red ant: XVII. VITALITY OF ANOMMAS – THE HEN PASSES IN FRONT OF THE NOSE

|

The adventures of a red ant: XVII. VITALITY OF ANOMMAS – THE HEN PASSES IN FRONT OF THE NOSE Before the end of the following week, I had eaten python like the others, we had surprised one in a swamp … Read More

Henri Poincaré, Why space with three dimensions – Space and Nature

|

But the question can be asked from a completely different point of view. We have so far placed ourselves in a purely subjective, purely psychological or, if you will, physiological point of view; we have only considered the relations of … Read More

The adventures of a red ant: XVI. IN SENEGAL – N’DIEN – THE PYTHON

|

I remained a few days in the orchard; but, by two or three adventures which nearly happened to me, I judged that the stay in the midst of those big oxen which blindly trampled all this campaign, was unhealthy for … Read More

Henri Poincaré, Why space with three dimensions – Space and movements

|

It seems, therefore, that space cannot be constructed by considering sets of simultaneous sensations, which must be considered as sequences of sensations. Always go back to what I said before. Why do certain changes appear to us as changes of … Read More

1 … 70 71 72 73 74 75 76 … 384