Talk:Phi

Phi is a symbol used when describing grain size in sedimentology. Wentworth and Krumbian scales both use φ to describe the size of individual sediment particles.

This should be added to the list of scientific measurements that utilize phi.

See more here: https://en.wikipedia.org/wiki/Grain_size

the first line "lowercase φ or ϕ" shows two identical symbols on my computer and it's not clear how they are distinguished. i'm not sure how you could guarantee that both different symbols are shown.

It would be useful to highlight that, of the three-part set-builder notation, "The formula 𝚽(𝑥) is said to be the rule or the predicate"--~2026-73652-3 (talk) 23:52, 2 February 2026 (UTC)