Objects of class simpleTriplet define matrices that are stored in a
sparse format. Only the row- and column indices and the corresponding values
of non-zero cells are stored. Additionally, the dimension of the matrix given
by the total number of rows and columns is stored.
i:a numeric vector specifying row-indices with each value being geq 1 and leq of the value in nrRows
j:a numeric vector specifying column-indices with each value being geq 1 and leq of the value in nrCols
v:a numeric vector specifying the values of the matrix in cells specified by the corresponding row- and column indices
nrRows:a numeric vector of length 1 holding the total number of rows of the matrix
nrCols:a numeric vector of length 1 holding the total number of columns of the matrix
objects of class simpleTriplet are input of slot constraints in class linProb-class and slot slot con in class cutList-class