双线大写 Pi ℿ

The capital letter 「pi」 is commonly used to denote product in mathematics. It may also describe potential energy in dimensional analysis. As for scientific papers, you are most likely to encounter classic symbols along with additional decorative elements such as ∏ , 𝛱 , 𝝥 . They belong to the category 字母和数字符号  1D400–1D7FF .

Double struck uppercase letter pi is also suitable for writing formulas and calculations. However, it is more often seen in headings, nicknames, titles, and other texts that are supposed to draw the readers' attention. Use the uppercase pi in combination with other outlined symbols to make your text look remarkable.

符号 「双线大写 Pi」 包含在 「字母式符号」 块的 「其他字母符號」 子块中，并在2002年作为Unicode版本3.2的一部分获得批准。