tmp/tmpohetmcp6/{from.md → to.md}
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#### Diagonal tags <a id="linalg.tags.diagonal">[[linalg.tags.diagonal]]</a>
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``` cpp
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struct implicit_unit_diagonal_t {
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explicit implicit_unit_diagonal_t() = default;
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};
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inline constexpr implicit_unit_diagonal_t implicit_unit_diagonal{};
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struct explicit_diagonal_t {
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explicit explicit_diagonal_t() = default;
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};
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inline constexpr explicit_diagonal_t explicit_diagonal{};
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```
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These tag classes specify whether algorithms access the matrix’s
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diagonal entries, and if not, then how algorithms interpret the matrix’s
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implicitly represented diagonal values.
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The `implicit_unit_diagonal_t` tag indicates that an implicit unit
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diagonal is to be assumed [[linalg.general]].
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The `explicit_diagonal_t` tag indicates that an explicit diagonal is
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used [[linalg.general]].
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