Talk:Proper frame
Add topicLatest comment: 2 years ago by 104.175.224.156 in topic Symbol 𝜕
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Symbol 𝜕
[edit]This symbol is suddenly introduced in this page, within a sentence that seems somewhat disconnected with what precedes and rather unclear. Is it possibile that there’s a missing paragraph where 𝜕 is more properly defined? 104.175.224.156 (talk) 13:20, 5 August 2023 (UTC)