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<title>Octave Fuzzy Logic Toolkit: einstein_sum</title>
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Function Reference: <b><code>einstein_sum</code></b>
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<dl>
<dt><u>Function File:</u> <var>retval</var> = <b>einstein_sum</b><i> (<var>x</var>)</i></dt>
<dt><u>Function File:</u> <var>retval</var> = <b>einstein_sum</b><i> (<var>x</var>, <var>y</var>)</i></dt>
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<p> Return the Einstein sum of the input.
The Einstein sum of two real scalars x and y is: (x + y) / (1 + x * y)
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<p> For one vector argument, apply the Einstein sum to all of the elements
of the vector. (The Einstein sum is associative.) For one
two-dimensional matrix argument, return a vector of the Einstein sum
of each column.
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<p> For two vectors or matrices of identical dimensions, or for one scalar and
one vector or matrix argument, return the pairwise Einstein sum.
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<p> <strong>See also: </strong>
<a href="algebraic_product.html">algebraic_product</a>,
<a href="algebraic_sum.html">algebraic_sum</a>,
<a href="bounded_difference.html">bounded_difference</a>,
<a href="bounded_sum.html">bounded_sum</a>,
<a href="drastic_product.html">drastic_product</a>,
<a href="drastic_sum.html">drastic_sum</a>,
<a href="einstein_product.html">einstein_product</a>,
<a href="hamacher_product.html">hamacher_product</a>,
<a href="hamacher_sum.html">hamacher_sum</a>
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