Julia allows the use of unicode symbols to replace variable names and for function calls. Unicode operations are entered in this pattern \name[tab]. That is a slash, \, the name (e.g., alpha), and then a press of the tab key.
In these notes, the following may appear as variable or function names
\Name | Symbol | Usage notes |
|---|---|---|
\euler | ℯ | The variable e |
\pi | π | |
\alpha | α | |
\beta | β | |
\delta | δ | |
\Delta | Δ | Change, as in Δx |
\gamma | γ | |
\phi | ϕ | |
\Phi | Φ | Used for parameterized surfaces |
x\_1 | x₁ | Subscripts |
r\vec | r⃗ | Vector annotation |
T\hat | T̂ | Unit vector annotation |
The following are associated with derivatives
\Name | Symbol | Usage notes |
|---|---|---|
\partial | ∂ | |
\nabla | ∇ | del operator in CwJ package |
The following are infix operators
\Name | Symbol | Usage notes |
|---|---|---|
\circ | ∘ | composition |
\cdot | ⋅ | dot product |
\times | × | cross product |
Infix operators may need parentheses due to precedence rules. For example, to call a composition, one needs (f ∘ g)(x) so that composition happens before function evaluation (g(x)).