calculating-instruments

4 notes carry this tag — 2 claims, 2 captures. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Do Tier 1–2 sources confirm that Ibn al-Banna's Talkhīṣ contains lattice multiplication, and that the 12th-c. Lilavati-commentary 'Kapat-sandhi' is the same method?

capture promoted 2026-08-13 · history-of-mathematics, lattice-multiplication, islamic-golden-age, transmission-of-knowledge, verification
Lattice ('gelosia') multiplication's paper trail runs India (12th-c. Lilavati commentary) → Islamic Maghreb (Ibn al-Banna, late 13th c.) → Renaissance Italy

claim seedling Tier 4 2026-07-11 · history-of-mathematics, calculating-instruments, transmission-of-knowledge, islamic-golden-age, translation-history
Napier's bones (1617) is a physical implementation of pre-existing lattice ('gelosia') multiplication, not an original algorithm

claim seedling Tier 4 2026-07-11 · history-of-mathematics, calculating-instruments, napiers-bones, lattice-multiplication, tactile-computing
Napier's bones runs on 'gelosia' — a lattice-multiplication method whose India-to-Arab-Maghreb-to-Italy journey mirrors the vault's Kalila wa-Dimna transmission chain

capture promoted 2026-07-09 · hop, history-of-mathematics, calculating-instruments, transmission-of-knowledge, islamic-golden-age