Assuming 8712 is required, the following results were found.

  • Useful XHTML Character Entities

    U+2203 ISOtech empty ∅ ∅ empty set = null set = diameter, nabla ∇ ∇ nabla = backward difference, isin ∈ ∈ element of, U+2208 ISOtech notin ∉ ∉ not an element of, U+2209 ISOtech ni ∋ ∋ contains as member, U+220B ISOtech prod...

    https://www.waltercedric.com/index.php/development/124-java/references/1081-

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