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Specifies whether a header cell is a header for a column (scope="col"), row (scope="row"), group of columns (colspan="2" scope="colgroup"), or group of rows (rowspan="2" scope="rowgroup"). It has no visual effect, but is used by screen readers and is recommended according to accessibility guidelines .
For a (0,2) tensor, [1] twice contracting with the inverse metric tensor and contracting in different indices raises each index: =. Similarly, twice contracting with the metric tensor and contracting in different indices lowers each index:
In 2017, jQuery was used on 69.2% of the top 1 million websites (according to Libscore). [7] In 2018, jQuery was used on 78% of the top 1 million websites. [19] In 2019, jQuery was used on 80% of the top 1 million websites (according to BuiltWith), [19] and 74.1% of the top 10 million (per W3Techs). [6]
Git has two data structures: a mutable index (also called stage or cache) that caches information about the working directory and the next revision to be committed; and an object database that stores immutable objects. The index serves as a connection point between the object database and the working tree.
With the addition of a Brewster window (left), this change in polarization can be converted to a change in the intensity of the beam, by transmitting only the p-polarized vector component. In optics , the Pockels effect , or Pockels electro-optic effect , is a directionally-dependent linear variation in the refractive index of an optical medium ...