Monthly Archives: October 2014

Latest rise of the old moon

Recent mornings, looking out my window before dawn, I have seen the moon wane narrower and narrower. I suppose today was the last morning it will be seen for a few weeks. Time on the first photo is 6:26, daylight savings time in Istanbul, a few minutes after the prayer call from the mosque down the street.

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The Hyperbola

Here is the model that I made of the hyperbola, or rather the conjugate hyperbolae, as Apollonius calls them.

Conjugate hyperbolae and their common diameter

Conjugate hyperbolae and their common diameter


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The Parabola

I do not now recall my specific inspiration; but in January of 2012, sitting at home in Istanbul, I cut up a cardboard box in order to make a model of a parabola quâ conic section.

January 14, 2012

January 14, 2012


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