Category:Pages using Math with unknown parameters

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This category contains pages transcluding Template:Math (talk) with unknown parameters (undefined, misspelled, etc.).

Pages are typically sorted alphabetically by the unknown parameter that is used, e.g. pages using unknown parameter |foo= will be sorted under "F". The name of the page is typically used as a secondary sort key. See additional information from the Parameter usage report for Template:Math.

Common problems:

• Expressions with an equal sign, like {{math|foo=bar}}, replace with {{math|1=foo=bar}}
• Expression using pipe symbols for norm, {{math|1=|x|}}, replace with {{math|1={{!}}x{{!}} }}

Note: the following code habit is not an error.

{{math|{1, 2, 3}|}} is not an error, and should be left unedited.

In code: the indices can range over the set {{math|{1, 2, 3}|}}

Text shown: "... the indices can range over the set {1, 2, 3}"

The extra pipe symbol in {{math|{1, 2, 3}|}} is unused but does not corrupt the math text. It helps understanding the input text (distinguishing the various }-symbol).

It produces a categorisation here, and a Warning: "unknown parameter |2=". However, since it is helpful, it is not an error, and it should not be edited out. As of Sept 2021^[update], no articles are listed with this feature.