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   "source": [
    "See as example https://indico.cern.ch/event/147827/material/slides/1?contribId=9, slide 16"
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    "# Diagonalization example"
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## Propagation of temperature difference

$$E^\text{(corr)}_{\text{year}} = E_{\text{year}} / (1 + \alpha_{\text{year}})$$

we want

$$E^\text{(corr)}_{\text{2012}} = E^\text{(corr)}_{\text{2015}} $$

and we know (temperature effect):

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#include "RooFit.h"
#include "RooTrace.h"
#include "Riostream.h"

#include <vector>
#include <string>

#include "RooSpline.h"
#include "RooNameReg.h"
#include "RooAbsReal.h"

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