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The empty set?[edit]

Perhaps Jakesyl would like to remind us how a long list of digits is more appropriate to the talk page than the following question, which the digits replaced. —Tamfang (talk) 06:52, 15 July 2014 (UTC)

No mention of phi as the empty set? Barry.carter (talk) 23:07, 11 August 2013 (UTC)

Isn't there something in the article about other symbols that resemble phi? —Tamfang (talk) 09:30, 12 July 2014 (UTC)
Well, good this is here. Otherwise, I wouldn't believe that people could confuse those symbols... — LlywelynII 04:16, 6 October 2014 (UTC) — Preceding unsigned comment added by (talk) 14:59, 10 November 2014 (UTC)

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:

Semi-protected edit request on 8 October 2016[edit]

To add to existing list ending with line: "In lexical-functional grammar, the function that maps elements from the c-structure to the f-structure."

The symbol for Relative Humidity

[1] [2] (talk) 12:03, 8 October 2016 (UTC)


Looks like the entry is there. — Andy W. (talk) 00:22, 13 October 2016 (UTC)