New Calculator Handles Disjoint Interval Sets

The creator of a new calculator, who has been studying interval arithmetic for weeks, has built a tool that accurately handles division by intervals containing zero. Computing 1 / [-1, 2] yields [-∞, -1] U [0.5, +∞], a union of two disjoint intervals.

The calculator, posted on Show HN and available open-source, was built with TypeScript. The author notes that standard interval arithmetic poorly handles division by intervals containing zero, a problem their calculator addresses.

The calculator’s implementation ensures accuracy using IEEE 754 double precision floats with outward rounding. This development could significantly impact fields requiring precise computations.

Updates

• 2026-10-08 — Anne Carson wins Nobel Prize in literature 2026 (source)
• 2026-09-29 — iOS 27’s Shortcuts app adds 35+ new, improved actions, here’s what’s new (source)
• 2026-09-25 — TechCrunch Disrupt 2026: Ricursive Intelligence’s Anna Goldie and Azalia Mirhoseini on when AI starts designing its own hardware (source)
• 2026-08-18 — Apple overhauls its EU App Store fees, loosens rules for alternative app stores (source)
• 2026-05-18 — Kin Health raises $9M to build an AI notetaker for patients (source)