Numeric error propagation: Difference between revisions
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<pre>111.80339887498948 ±2.4871670631463423</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<lang mathematica>PlusMinus /: a_ ± σa_ + c_?NumericQ := N[(a + c) ± σa];
PlusMinus /: a_ ± σa_ + b_ ± σb_ := N[(a + b) ± Norm@{σa, σb}];
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