First[expr] gives the first element in expr.

HoldFirst is an attribute which specifies that the first argument to a function is to be maintained in an unevaluated form.

NHoldFirst is an attribute which specifies that the first argument to a function should not be affected by N.

The following is a linear first-order ODE because both y[x] and y^′[x] occur in it with power 1 and y^′[x] is the highest derivative. Note that the solution contains the ...

Type 2+2 and then press Shift+Enter (hold down the Shift key and press Enter) to tell Mathematica to evaluate your input. Note that labels are added automatically, and output ...

MATHEMATICA CHARACTER NAME Tutorials ▼ Letters and Letter-like Forms Related Guides ▼ Listing of Named Characters URL ▼ ref/character/FirstPage Copy Mathematica URL Copy web ...

ParagraphIndent is an option for Cell which specifies how far in printer's points to indent the first line of each paragraph of text.

DepthFirstScan[g, s, {"event_1" -> f_1, "event_2" -> f_2, ...}] performs a depth-first scan of the graph g starting at the vertex s and evaluates f_i whenever "event_i" ...

BreadthFirstScan[g, s, {"event_1" -> f_1, "event_2" -> f_2, ...}] performs a breadth-first scan (bfs) of the graph g starting at the vertex s and evaluates f_i whenever ...

EllipticF[\[Phi], m] gives the elliptic integral of the first kind F(\[Phi] \[VerticalSeparator] m).