7 |
7 |
8 %\title{Blob Homology} |
8 %\title{Blob Homology} |
9 \title{Sandbox} |
9 \title{Sandbox} |
10 \begin{document} |
10 \begin{document} |
11 |
11 |
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12 \newcommand{\vertex}{node[circle,fill=black,inner sep=1pt] {}} |
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13 |
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14 \begin{tikzpicture} |
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15 \coordinate (P) at (0,0); |
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16 \coordinate (Q) at (3,0); |
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17 \coordinate (R) at (1.5,-0.5); |
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18 \draw (P) \vertex to[out=40,in=140] node[above] {$a$} (Q) \vertex -- node[below] {\scriptsize $y \times I$} (R) \vertex to[out=-180,in=-40] node[below] {$a$} (P); |
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19 \clip (P) to[out=40,in=140] (Q) -- (R) to[out=-180,in=-40] (P); |
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20 \foreach \x in {1,...,9} { |
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21 \path (P) to[out=40,in=140] node[pos=\x/10] (PQ\x) {} (Q); |
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22 \path (P) to[out=-40,in=-180] node[pos=\x/10] (PR\x) {} (R); |
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23 \draw[green!50!brown] (PQ\x.center) -- (PR\x.center); |
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24 } |
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25 \end{tikzpicture} |
12 |
26 |
13 \begin{tikzpicture} |
27 \begin{tikzpicture} |
14 \node[circle,fill=black,inner sep=1pt] (A) at (1.73,0) {}; |
28 \node[circle,fill=black,inner sep=1pt] (A) at (1.73,0) {}; |
15 \node[circle,fill=black,inner sep=1pt] (B) at (-1.73,0) {}; |
29 \node[circle,fill=black,inner sep=1pt] (B) at (-1.73,0) {}; |
16 \draw[dashed] (A) -- (B); |
30 \draw[dashed] (A) -- (B); |