Xypic
Xypic is installed
TODO: Flesh this page out
Samples
[math]\newcommand{\bigudot}{ \mathchoice{\mathop{\bigcup\mkern-15mu\cdot\mkern8mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}} }[/math][math]\newcommand{\udot}{\cup\mkern-12.5mu\cdot\mkern6.25mu\!}[/math][math]\require{AMScd}\newcommand{\d}[1][]{\mathrm{d}^{#1} }[/math]
[math]\begin{xy} \xymatrix { A \ar[r] \ar[d] \ar[drr] & B \ar[r] & *+{C} \ar@{}[] ="c" \\ D \ar[r] \ar[urr] & E \ar[r] & *+{F} \ar@{}[] ="f" \ar@2{->} "c";"f" } \end{xy} [/math][math] \xymatrix{ A \ar[r] ^a ="a" & B \ar@2{->}[r] ^b="b" & C \ar @/^/ "a";"b" } [/math]
[math] \begin{xy} %vertices (15,30)*+{\bigsqcup M_e}="v1";(45,30)*+{\bigsqcup N_e}="v2";% (0,15)*+{\bullet}="v3";(30,15)*+{\bullet}="v4";% (60,15)*+{\bullet}="v5";(15,0)*+{A}="v6";(45,0)*+{B}="v7";% %arrows {\ar@{->>} "v1"; "v3"}; {\ar@{->}_{m} "v1"; "v6"};% {\ar@{->>}^{p} "v1"; "v2"};{\ar@{->>} "v1"; "v4"};% {\ar@{->}_{n} "v2"; "v7"};{\ar@{->>} "v2"; "v5"};% {\ar@{>->}|{m’’} "v3";"v6"}; {\ar@{>->}|{(fm)’’} "v4"; "v7"};% {\ar@{->}|{n’’} "v5"; "v7"};{\ar@{->}_{f} "v6"; "v7"} \end{xy}[/math]
[math]\begin{xy} \xymatrix { *\txt{start} \ar[r] & *++[o][F-]{0} \ar@(r,u)[]^b \ar[r]_a & *++[o][F-]{1} \ar[r]^b \ar@(r,d)[]_a & *++[o][F-]{2} \ar[r]^b \ar `dr_l[l] `_ur[l] _(.2)a[l] & *++[o][F=]{3} \ar `ur^l[lll] `^dr[lll]^b [lll] \ar `dr_l[ll] `_ur[ll] [ll] } \end{xy}[/math]
