NotebookPut[expr] creates a notebook corresponding to expr and makes it the currently selected notebook in the front end. NotebookPut[] creates a new empty ...
NotebookRead[notebook] gives the expression corresponding to the current selection in the specified notebook object.
NotebooksMenu is a global option that specifies which recently opened notebooks are listed under the File menu.
NotebookWrite[notebook, data] writes data into a notebook at the current selection, setting the current selection to be just after the data written. NotebookWrite[notebook, ...
NotElement[x, dom] or x \[NotElement] dom asserts that x is not an element of the domain dom.NotElement[x_1 | ... | x_n, dom] asserts that none of the x_i are elements of ...
NProduct[f, {i, i_min, i_max}] gives a numerical approximation to the product \[Product]i = i_min i_max f.NProduct[f, {i, i_min, i_max, di}] uses a step di in the product.
NSum
(Built-in Mathematica Symbol) NSum[f, {i, i_min, i_max}] gives a numerical approximation to the sum \[Sum]i = i_min i_max f.NSum[f, {i, i_min, i_max, di}] uses a step di in the sum.
NullSpace[m] gives a list of vectors that forms a basis for the null space of the matrix m.
NumberFieldDiscriminant[a] gives the discriminant of the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.
NumberFieldFundamentalUnits[a] gives a list of fundamental units for the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.