kmundnic

function ∇tSTE(X::Array{Float64,2},
               no_objects::Int64,
               no_dims::Int64,
               no_triplets::Int64,
               triplets::Array{Int64,2},
               λ::Float64,
               α::Float64)

    P::Float64 = 0.0
    C::Float64 = 0.0 + λ * sum(X.^2) # Initialize cost including l2 regularization cost