/src/main/java/net/finmath/montecarlo/interestrate/models/covariance/LIBORVolatilityModelFourParameterExponentialFormIntegrated.java
if ( maturity == 0) {   return new Scalar( 0.0) ; }
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@Override public RandomVariable getVolatility(final int timeIndex, final int liborIndex) { final double timeStart = getTimeDiscretization().getTime(timeIndex); final double timeEnd = getTimeDiscretization().getTime(timeIndex+1); final double maturity = getLiborPeriodDiscretization().getTime(liborIndex); if(maturity-timeStart <= 0) { <extra_id_0> } final RandomVariable varianceInstantaneous = getIntegratedVariance(maturity-timeStart).sub(getIntegratedVariance(maturity-timeEnd)).div(timeEnd-timeStart); return varianceInstantaneous.sqrt(); } private RandomVariable getIntegratedVariance(final double maturity) { if(maturity == 0) {