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add Helper for doing the 1x3 * 3x5 = 1x5 calculation

Christos Anastopoulos requested to merge ATLAS-EGamma/athena:RungeKuttaUtils_3x5 into master

Add helper for not repeating

Jac[ 0] = Ax[0]*P[ 7]+Ax[1]*P[ 8]+Ax[2]*P[ 9];                               // dL0/dL0
Jac[ 1] = Ax[0]*P[14]+Ax[1]*P[15]+Ax[2]*P[16];                               // dL0/dL1
Jac[ 2] = Ax[0]*P[21]+Ax[1]*P[22]+Ax[2]*P[23];                               // dL0/dPhi
Jac[ 3] = Ax[0]*P[28]+Ax[1]*P[29]+Ax[2]*P[30];                               // dL0/dThe
Jac[ 4] = Ax[0]*P[35]+Ax[1]*P[36]+Ax[2]*P[37];                               // dL0/dCM

which is a 1x5 * 3x5 -> 1x5. RunTier0Tests.log RunTier0Tests.log

Edited by Christos Anastopoulos

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