A detailed manual for Drawing and Disbursing Officers, often found on Amazon India Note on PDF Downloads:

He wrote the answer with a steady hand, sketching the diagram from memory.

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The most sought-after title by this author is "Tropical Geometry," which has become a staple for those entering this relatively modern field of mathematics. Tropical geometry is a variant of algebraic geometry where polynomial addition is replaced by a maximum (or minimum) operation and multiplication is replaced by standard addition. Hanumanthu’s approach is lauded for its clarity, making it accessible to those who are already familiar with the basics of rings, fields, and varieties.

You can often find his lecture notes or seminar materials on the CMI Mathematics Faculty page ⚖️ Service Rules & Legal Books (P. Hanumanthu)