text/appendixes/comparing_defs.tex
changeset 941 ee0c940fce59
parent 936 d73a88d78498
child 947 ceed680b7f42
equal deleted inserted replaced
940:04079a7aeaef 941:ee0c940fce59
   528 Given 2-morphisms $f$ and $g$, we define the horizontal composition $f *_h g$ to be any of the four
   528 Given 2-morphisms $f$ and $g$, we define the horizontal composition $f *_h g$ to be any of the four
   529 equal 2-morphisms in Figure \ref{fzo5}.
   529 equal 2-morphisms in Figure \ref{fzo5}.
   530 Figure \ref{fig:horizontal-compositions-equal}illustrates part of the proof that these four 2-morphisms are equal.
   530 Figure \ref{fig:horizontal-compositions-equal}illustrates part of the proof that these four 2-morphisms are equal.
   531 Similar arguments show that horizontal composition is associative.
   531 Similar arguments show that horizontal composition is associative.
   532 \begin{figure}[t]
   532 \begin{figure}[t]
   533 \begin{equation*}
   533 \begin{align*}
   534 \raisebox{-.9cm}{
   534 \raisebox{-.9cm}{
   535 \begin{tikzpicture}
   535 \begin{tikzpicture}
   536 	\draw (0,0) .. controls +(1,.8) and +(-1,.8) .. node[above] {$b$} (2.9,0)
   536 	\draw (0,0) .. controls +(1,.8) and +(-1,.8) .. node[above] {$b$} (2.9,0)
   537 				.. controls +(-1,-.8) and +(1,-.8) .. node[below] {$a$} (0,0);
   537 				.. controls +(-1,-.8) and +(1,-.8) .. node[below] {$a$} (0,0);
   538 	\draw[->, thick, orange!50!brown] (1.45,-.4)--  node[left, black] {$f$} +(0,.8);
   538 	\draw[->, thick, orange!50!brown] (1.45,-.4)--  node[left, black] {$f$} +(0,.8);
   542 \begin{tikzpicture}
   542 \begin{tikzpicture}
   543 	\draw (0,0) .. controls +(1,.8) and +(-1,.8) .. node[above] {$d$} (2.9,0)
   543 	\draw (0,0) .. controls +(1,.8) and +(-1,.8) .. node[above] {$d$} (2.9,0)
   544 				.. controls +(-1,-.8) and +(1,-.8) .. node[below] {$c$} (0,0);
   544 				.. controls +(-1,-.8) and +(1,-.8) .. node[below] {$c$} (0,0);
   545 	\draw[->, thick, orange!50!brown] (1.45,-.4)--  node[left, black] {$g$} +(0,.8);
   545 	\draw[->, thick, orange!50!brown] (1.45,-.4)--  node[left, black] {$g$} +(0,.8);
   546 \end{tikzpicture}}
   546 \end{tikzpicture}}
   547 \;=\;
   547 \;&=\;
   548 \raisebox{-1.9cm}{
   548 \raisebox{-1.9cm}{
   549 \begin{tikzpicture}
   549 \begin{tikzpicture}
   550 	\draw (0,0) coordinate (p1);
   550 	\draw (0,0) coordinate (p1);
   551 	\draw (5.8,0) coordinate (p2);
   551 	\draw (5.8,0) coordinate (p2);
   552 	\draw (2.9,.3) coordinate (pu);
   552 	\draw (2.9,.3) coordinate (pu);
   567 	\draw (p1) .. controls +(1,-2) and +(-1,-1) .. (pd);
   567 	\draw (p1) .. controls +(1,-2) and +(-1,-1) .. (pd);
   568 	\draw (p2) .. controls +(-1,2) and +(1,1) .. (pu);
   568 	\draw (p2) .. controls +(-1,2) and +(1,1) .. (pu);
   569 	\draw[->, thick, orange!50!brown] (1.45,-1.1)--  node[left, black] {$f$} +(0,.7);
   569 	\draw[->, thick, orange!50!brown] (1.45,-1.1)--  node[left, black] {$f$} +(0,.7);
   570 	\draw[->, thick, orange!50!brown] (4.35,.4)--  node[left, black] {$g$} +(0,.7);
   570 	\draw[->, thick, orange!50!brown] (4.35,.4)--  node[left, black] {$g$} +(0,.7);
   571 	\draw[->, thick, blue!75!yellow] (1.5,.78) node[black, above] {$(b\cdot c)\times I$} -- (2.5,0);
   571 	\draw[->, thick, blue!75!yellow] (1.5,.78) node[black, above] {$(b\cdot c)\times I$} -- (2.5,0);
   572 \end{tikzpicture}}
   572 \end{tikzpicture}} \\
   573 \end{equation*}
   573 \;&=\;
   574 \begin{equation*}
   574 \raisebox{-2.1cm}{
   575 \mathfig{0.6}{triangle/triangle3b}
   575 \begin{tikzpicture}
   576 \end{equation*}
   576 	\draw (0,0) coordinate (p1);
       
   577 	\draw (5.8,0) coordinate (p2);
       
   578 	\draw (2.9,0) coordinate (pu);
       
   579 	\draw (2.9,-.9) coordinate (pd);
       
   580 	\begin{scope}
       
   581 		\clip (p1) .. controls +(.6,-.3) and +(-.5,-.3) .. (pu)
       
   582 					.. controls +(.5,-.3) and +(-.6,-.3) .. (p2)
       
   583 					.. controls +(-.6,-.9) and +(.5,0) .. (pd)
       
   584 					.. controls +(-.5,0) and +(.6,-.9) .. (p1);
       
   585 		\foreach \t in {0,.03,...,1} {
       
   586 			\draw[green!50!brown] ($(p1)!\t!(p2) + (0,2)$) -- +(0,-4);
       
   587 		}
       
   588 	\end{scope}
       
   589 	\draw  (p1) .. controls +(.6,-.3) and +(-.5,-.3) .. (pu)
       
   590 					.. controls +(.5,-.3) and +(-.6,-.3) .. (p2)
       
   591 					.. controls +(-.6,-.9) and +(.5,0) .. (pd)
       
   592 					.. controls +(-.5,0) and +(.6,-.9) .. (p1);
       
   593 	\draw (p1) .. controls +(1,1) and +(-1,1) .. (pu);
       
   594 	\draw (p2) .. controls +(-1,1) and +(1,1) .. (pu);
       
   595 	\draw[->, thick, orange!50!brown] (1.45,-0.1)--  node[left, black] {$f$} +(0,.7);
       
   596 	\draw[->, thick, orange!50!brown] (4.35,-0.1)--  node[left, black] {$g$} +(0,.7);
       
   597 	\draw[->, thick, blue!75!yellow] (4.3,-1.5) node[black, below] {$(a\cdot c)\times I$} -- (3.3,-0.5);
       
   598 \end{tikzpicture}} \\
       
   599 \;&=\;
       
   600 \raisebox{-1.9cm}{
       
   601 \begin{tikzpicture}[y=-1cm]
       
   602 	\draw (0,0) coordinate (p1);
       
   603 	\draw (5.8,0) coordinate (p2);
       
   604 	\draw (2.9,.3) coordinate (pu);
       
   605 	\draw (2.9,-.3) coordinate (pd);
       
   606 	\begin{scope}
       
   607 		\clip (p1) .. controls +(.6,.3) and +(-.5,0) .. (pu)
       
   608 					.. controls +(.5,0) and +(-.6,.3) .. (p2)
       
   609 					.. controls +(-.6,-.3) and +(.5,0) .. (pd)
       
   610 					.. controls +(-.5,0) and +(.6,-.3) .. (p1);
       
   611 		\foreach \t in {0,.03,...,1} {
       
   612 			\draw[green!50!brown] ($(p1)!\t!(p2) + (0,2)$) -- +(0,-4);
       
   613 		}
       
   614 	\end{scope}
       
   615 	\draw (p1) .. controls +(.6,.3) and +(-.5,0) .. (pu)
       
   616 				.. controls +(.5,0) and +(-.6,.3) .. (p2)
       
   617 				.. controls +(-.6,-.3) and +(.5,0) .. (pd)
       
   618 				.. controls +(-.5,0) and +(.6,-.3) .. (p1);
       
   619 	\draw (p1) .. controls +(1,-2) and +(-1,-1) .. (pd);
       
   620 	\draw (p2) .. controls +(-1,2) and +(1,1) .. (pu);
       
   621 	\draw[<-, thick, orange!50!brown] (1.45,-1.1)--  node[left, black] {$f$} +(0,.7);
       
   622 	\draw[<-, thick, orange!50!brown] (4.35,.4)--  node[left, black] {$g$} +(0,.7);
       
   623 	\draw[->, thick, blue!75!yellow] (1.5,.78) node[black, below] {$(a\cdot d)\times I$} -- (2.5,0);
       
   624 \end{tikzpicture}} \\
       
   625 \;&=\;
       
   626 \raisebox{-1.0cm}{
       
   627 \begin{tikzpicture}[y=-1cm]
       
   628 	\draw (0,0) coordinate (p1);
       
   629 	\draw (5.8,0) coordinate (p2);
       
   630 	\draw (2.9,0) coordinate (pu);
       
   631 	\draw (2.9,-.9) coordinate (pd);
       
   632 	\begin{scope}
       
   633 		\clip (p1) .. controls +(.6,-.3) and +(-.5,-.3) .. (pu)
       
   634 					.. controls +(.5,-.3) and +(-.6,-.3) .. (p2)
       
   635 					.. controls +(-.6,-.9) and +(.5,0) .. (pd)
       
   636 					.. controls +(-.5,0) and +(.6,-.9) .. (p1);
       
   637 		\foreach \t in {0,.03,...,1} {
       
   638 			\draw[green!50!brown] ($(p1)!\t!(p2) + (0,2)$) -- +(0,-4);
       
   639 		}
       
   640 	\end{scope}
       
   641 	\draw  (p1) .. controls +(.6,-.3) and +(-.5,-.3) .. (pu)
       
   642 					.. controls +(.5,-.3) and +(-.6,-.3) .. (p2)
       
   643 					.. controls +(-.6,-.9) and +(.5,0) .. (pd)
       
   644 					.. controls +(-.5,0) and +(.6,-.9) .. (p1);
       
   645 	\draw (p1) .. controls +(1,1) and +(-1,1) .. (pu);
       
   646 	\draw (p2) .. controls +(-1,1) and +(1,1) .. (pu);
       
   647 	\draw[<-, thick, orange!50!brown] (1.45,-0.1)--  node[left, black] {$f$} +(0,.7);
       
   648 	\draw[<-, thick, orange!50!brown] (4.35,-0.1)--  node[left, black] {$g$} +(0,.7);
       
   649 	\draw[->, thick, blue!75!yellow] (4.3,-1.5) node[black, above] {$(b\cdot d)\times I$} -- (3.3,-0.5);
       
   650 \end{tikzpicture}} 
       
   651 \end{align*}
   577 \caption{Horizontal composition of 2-morphisms}
   652 \caption{Horizontal composition of 2-morphisms}
   578 \label{fzo5}
   653 \label{fzo5}
   579 \end{figure}
   654 \end{figure}
   580 \begin{figure}[t]
   655 \begin{figure}[t]
   581 $$
   656 $$