{tensor} is for questions addressing issues related with tensors.

tensor is a pack­age which al­lows the user to set ten­sor-style {su­perscripts} and {subscripts} with off­sets be­tween suc­ces­sive in­dices. It sup­ports the type­set­ting of ten­sors with mixed up­per and lower in­dices with spac­ing, also typset pre­posed in­dices. Tensors are geometric objects that describe linear relations between vectors, scalars, and other tensors. A tensor can be represented as a multi-dimensional array of numerical values.