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Tag Archives: geometry

the 4th dimension [Q&A]

Gautham of Poornaprajna College asks, what is the definition of time in 4-dimensional space? Typically, when people speak of the 4th dimension, they are talking of a spatial dimension. Any point in the 3-D space we are used to can be represented by 3 coordinates, say (x,y,z), with unit vectors all perpendicular to each other. […]

yasti yantra [Q&A]

Suhas of Poornaprajna PU College asks, what is the stick machine of Bhaskaracharya? I had no idea what it was until I looked it up online. There is a nice description in a report by S. Narvekar (Astronomical Instruments of Ancient India, IFToMM 2007) that describes a stick-like device that can be used to measure […]