Talk:Phi
Add topicLatest comment: 5 months ago by ~2026-73652-3 in topic Inclusion of 𝚽 as representative of the predicate in set-builder notation
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Grain Size
[edit]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
alternate symbol
[edit]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.
Inclusion of 𝚽 as representative of the predicate in set-builder notation
[edit]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)