| %+-% | Plus Minus, it shows x and calculates x +- y |
| %->% | Right arrow, presented as x -> y |
| %.% | Product x * y, shown as x dot y |
| %<-% | Left arrow, presented as x <- y |
| %<->% | Double sided arrow, presented as x <-> y |
| %<=% | Right double arrow, displayed as x => y |
| %<=>% | If and only if condition, displayed as x <=> y |
| %==% | Equivalence, shown as x == y |
| %=>% | Left double arrow, displayed as x <= y |
| %=~% | Congruence, shown as x =~ y |
| %dbldown% | Down double arrow, displayed as x dArr y |
| %dblup% | Up double arrow, displayed as x uArr y |
| %down% | Down arrow, presented as x downarrow y |
| %prop% | Proportional, shown as x o< y |
| %up% | Up arrow, presented as x up y |
| %~~% | Approximate equality, shown as x ~~ y |
| add | add |
| add_left | add_left |
| add_right | add_right |
| bold | Identity functions for different font styles |
| boxed | Identity functions for different decorations |
| cal | Calligraphic font |
| cancel | Identity functions for different decorations |
| canonical | Canonicalize an R call: Reorder the function arguments |
| color | Identity functions for different decorations |
| decorations | Identity functions for different decorations |
| denote | denote This is a function that allows the user to insert abbreviations in the formula, explain them and make the needed computations |
| dfrac | Division displayed as large fraction |
| dot | Multiplication |
| fname | Return function body |
| fontstyles | Identity functions for different font styles |
| frac | Division displayed as fraction |
| hook | Hook for custom symbols |
| hyph | Identity functions for different decorations |
| inline | MathML or MathJax output, depending on the knitr context |
| instead | instead |
| italic | Identity functions for different font styles |
| math | Adds the class "math" to the object for knitr output via 'mathout()' |
| mathjax | Mathjax output |
| mathml | MathML output |
| mathml_preproc | Map R operators to their respective Prolog counterparts |
| mathout | MathML or MathJax output, depending on the knitr context |
| name | Add a name attribute to an element (most often, an R function) |
| nodot | Multiplication |
| omit | omit |
| omit_left | omit_left This is a function that allows the user to highlight the mistakes, in particular the omissions in the left-hand side of the expression |
| omit_right | omit_right This is a function that allows the user to highlight the mistakes, in particular the omissions in the right-hand side of the expression |
| over | Identity functions for different decorations |
| phantom | Identity functions for different decorations |
| plain | Identity functions for different font styles |
| prime | Identity functions for different decorations |
| prod_over | product over a range. On the R side, this function just returns the product of the first argument, but allows for decorations. |
| roof | Identity functions for different decorations |
| sum_over | sum over a range. On the R side, this function just returns the first argument, but allows for decorations. |
| tilde | Identity functions for different decorations |
| times | Multiplication |
| under | Identity functions for different decorations |
| underover | Identity functions for different decorations |
| unhook | Hook for custom symbols |