National People's Congress Economic Forum › Forum › Econometrics and Statistics Forum District 5 › Econometrics and Statistical Software › Deap Calculation Calculation of the malmquist index is effch pech sech. Why is it all 1? When the autocorrelator is used to measure the width of the mode-locked pulse, the relationship between the hyperbolic secant (sech) fit and the product of the full width at half maximum (fwhm, full width at half maximum) is 1.54, which is derived from the mathematical properties of the autocorrelation process. When dealing with laser pulses close to double. (x) = cosh (x) d d x tanh (x) = s e c h 2 x d d x coth (x) = − c s c h 2 x {\mathrm {d}\over\mathrm {d}x}\cosh (x)=\sinh (x)\quad {\mathrm {d}\over\mathrm {d}x}\sinh (x)=\cosh.
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85 people agreed with this answer. There is an interesting pronunciation on Wikipedia. Hyperbolic sine sinh is pronounced as /sintʃ/, hyperbolic cosine is pronounced as /kɔʃ/, hyperbolic tangent tanh is pronounced as /tæntʃ/, hyperbolic cotangent coth is pronounced as /kɔθ/, hyperbolic secant sech is pronounced as /setʃ/, hyperbolic.
