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  2. Help:Collapsing tables and more - Wikipedia

    en.wikipedia.org/wiki/Help:Collapsing_tables_and...

    Adding the mw-collapsible class to a table automatically positions the toggle, and selects which parts to collapse. A common use is to make a collapsible layout table, which always displays an introduction or summary, but hides the rest of the content from immediate view.

  3. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    Pandas supports hierarchical indices with multiple values per data point. An index with this structure, called a "MultiIndex", allows a single DataFrame to represent multiple dimensions, similar to a pivot table in Microsoft Excel. [4]: 147–148 Each level of a MultiIndex can be given a unique name.

  4. Help:Table/Advanced - Wikipedia

    en.wikipedia.org/wiki/Help:Table/Advanced

    Also, if the table has cell spacing (and thus border-collapse=separate), meaning that cells have separate borders with a gap in between, that gap will still be visible. A cruder way to align columns of numbers is to use a figure space   or   , which is intended to be the width of a numeral, though is font-dependent in practice:

  5. Multi-index notation - Wikipedia

    en.wikipedia.org/wiki/Multi-index_notation

    Multi-index notation is a mathematical notation that simplifies formulas used in multivariable calculus, partial differential equations and the theory of distributions, by generalising the concept of an integer index to an ordered tuple of indices.

  6. Template:Collapse - Wikipedia

    en.wikipedia.org/wiki/Template:Collapse

    Creates a collapsible box that allows its content to be hidden or revealed on user's command. It is used to reduce clutter. Template parameters [Edit template data] Parameter Description Type Status Contents 1 content text Contents of the box Content required Title 2 title heading header reason result Text of title bar. Defaults to "Extended contents". Default Extended content String suggested ...

  7. Help talk:Collapsing - Wikipedia

    en.wikipedia.org/wiki/Help_talk:Collapsing

    The content in question is currently in a table so it seems logical to use collapsible tables but in the Help for Collapse (top and bottom) it mentions it can also be used to collapse complex content that includes tables. Doesn't seem to be any clear indication which is recommended.

  8. Collapse (topology) - Wikipedia

    en.wikipedia.org/wiki/Collapse_(topology)

    A simplicial collapse of is the removal of all simplices such that , where is a free face. If additionally we have dim ⁡ τ = dim ⁡ σ − 1 , {\displaystyle \dim \tau =\dim \sigma -1,} then this is called an elementary collapse .

  9. Raising and lowering indices - Wikipedia

    en.wikipedia.org/wiki/Raising_and_lowering_indices

    This process is called raising the index. Raising and then lowering the same index (or conversely) are inverse operations, which is reflected in the metric and inverse metric tensors being inverse to each other (as is suggested by the terminology): = = =