xref: /petsc/src/dm/impls/plex/tutorials/output/ex11_ref_quadrilateral.out (revision dfd57a172ac9fa6c7b5fe6de6ab5df85cefc2996) 
1quadrilateral orientation -4
2\documentclass[tikz]{standalone}
3
4\usepackage{pgflibraryshapes}
5\usetikzlibrary{backgrounds}
6\usetikzlibrary{arrows}
7\begin{document}
8\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
9\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
10\path (2.,2.) node(5_0) [draw,shape=circle,color=gray] {5};
11\path (2.,-2.) node(6_0) [draw,shape=circle,color=gray] {6};
12\path (-2.,-2.) node(7_0) [draw,shape=circle,color=gray] {7};
13\path (-2.,2.) node(8_0) [draw,shape=circle,color=gray] {8};
14\path (2.,0.) node(9_0) [draw,shape=circle,color=gray] {9};
15\path (0.,-2.) node(10_0) [draw,shape=circle,color=gray] {10};
16\path (-2.,0.) node(11_0) [draw,shape=circle,color=gray] {11};
17\path (0.,2.) node(12_0) [draw,shape=circle,color=gray] {12};
18\path
19(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
20(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
21(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
22(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
23(2.,1.) node(17_0) [draw,shape=circle,color=gray] {17} --
24(2.,-1.) node(18_0) [draw,shape=circle,color=gray] {18} --
25(1.,-2.) node(19_0) [draw,shape=circle,color=gray] {19} --
26(-1.,-2.) node(20_0) [draw,shape=circle,color=gray] {20} --
27(-2.,-1.) node(21_0) [draw,shape=circle,color=gray] {21} --
28(-2.,1.) node(22_0) [draw,shape=circle,color=gray] {22} --
29(-1.,2.) node(23_0) [draw,shape=circle,color=gray] {23} --
30(1.,2.) node(24_0) [draw,shape=circle,color=gray] {24} --
31(0,0);
32\draw[color=gray] (7_0) -- (20_0) -- (10_0) -- (13_0) -- (4_0) -- (16_0) -- (11_0) -- (21_0) -- (7_0);
33\draw[color=gray] (10_0) -- (19_0) -- (6_0) -- (18_0) -- (9_0) -- (14_0) -- (4_0) -- (13_0) -- (10_0);
34\draw[color=gray] (4_0) -- (14_0) -- (9_0) -- (17_0) -- (5_0) -- (24_0) -- (12_0) -- (15_0) -- (4_0);
35\draw[color=gray] (11_0) -- (16_0) -- (4_0) -- (15_0) -- (12_0) -- (23_0) -- (8_0) -- (22_0) -- (11_0);
36\path (-1.,-1.) node(0_0) [] {};
37\path (1.,-1.) node(1_0) [] {};
38\path (1.,1.) node(2_0) [] {};
39\path (-1.,1.) node(3_0) [] {};
40\end{tikzpicture}
41\end{document}
42quadrilateral orientation -3
43\documentclass[tikz]{standalone}
44
45\usepackage{pgflibraryshapes}
46\usetikzlibrary{backgrounds}
47\usetikzlibrary{arrows}
48\begin{document}
49\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
50\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
51\path (2.,-2.) node(5_0) [draw,shape=circle,color=gray] {5};
52\path (-2.,-2.) node(6_0) [draw,shape=circle,color=gray] {6};
53\path (-2.,2.) node(7_0) [draw,shape=circle,color=gray] {7};
54\path (2.,2.) node(8_0) [draw,shape=circle,color=gray] {8};
55\path (0.,-2.) node(9_0) [draw,shape=circle,color=gray] {9};
56\path (-2.,0.) node(10_0) [draw,shape=circle,color=gray] {10};
57\path (0.,2.) node(11_0) [draw,shape=circle,color=gray] {11};
58\path (2.,0.) node(12_0) [draw,shape=circle,color=gray] {12};
59\path
60(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
61(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
62(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
63(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
64(1.,-2.) node(17_0) [draw,shape=circle,color=gray] {17} --
65(-1.,-2.) node(18_0) [draw,shape=circle,color=gray] {18} --
66(-2.,-1.) node(19_0) [draw,shape=circle,color=gray] {19} --
67(-2.,1.) node(20_0) [draw,shape=circle,color=gray] {20} --
68(-1.,2.) node(21_0) [draw,shape=circle,color=gray] {21} --
69(1.,2.) node(22_0) [draw,shape=circle,color=gray] {22} --
70(2.,1.) node(23_0) [draw,shape=circle,color=gray] {23} --
71(2.,-1.) node(24_0) [draw,shape=circle,color=gray] {24} --
72(0,0);
73\draw[color=gray] (6_0) -- (18_0) -- (9_0) -- (13_0) -- (4_0) -- (16_0) -- (10_0) -- (19_0) -- (6_0);
74\draw[color=gray] (9_0) -- (17_0) -- (5_0) -- (24_0) -- (12_0) -- (14_0) -- (4_0) -- (13_0) -- (9_0);
75\draw[color=gray] (4_0) -- (14_0) -- (12_0) -- (23_0) -- (8_0) -- (22_0) -- (11_0) -- (15_0) -- (4_0);
76\draw[color=gray] (10_0) -- (16_0) -- (4_0) -- (15_0) -- (11_0) -- (21_0) -- (7_0) -- (20_0) -- (10_0);
77\path (-1.,-1.) node(0_0) [] {};
78\path (1.,-1.) node(1_0) [] {};
79\path (1.,1.) node(2_0) [] {};
80\path (-1.,1.) node(3_0) [] {};
81\end{tikzpicture}
82\end{document}
83quadrilateral orientation -2
84\documentclass[tikz]{standalone}
85
86\usepackage{pgflibraryshapes}
87\usetikzlibrary{backgrounds}
88\usetikzlibrary{arrows}
89\begin{document}
90\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
91\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
92\path (-2.,-2.) node(5_0) [draw,shape=circle,color=gray] {5};
93\path (-2.,2.) node(6_0) [draw,shape=circle,color=gray] {6};
94\path (2.,2.) node(7_0) [draw,shape=circle,color=gray] {7};
95\path (2.,-2.) node(8_0) [draw,shape=circle,color=gray] {8};
96\path (-2.,0.) node(9_0) [draw,shape=circle,color=gray] {9};
97\path (0.,2.) node(10_0) [draw,shape=circle,color=gray] {10};
98\path (2.,0.) node(11_0) [draw,shape=circle,color=gray] {11};
99\path (0.,-2.) node(12_0) [draw,shape=circle,color=gray] {12};
100\path
101(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
102(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
103(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
104(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
105(-2.,-1.) node(17_0) [draw,shape=circle,color=gray] {17} --
106(-2.,1.) node(18_0) [draw,shape=circle,color=gray] {18} --
107(-1.,2.) node(19_0) [draw,shape=circle,color=gray] {19} --
108(1.,2.) node(20_0) [draw,shape=circle,color=gray] {20} --
109(2.,1.) node(21_0) [draw,shape=circle,color=gray] {21} --
110(2.,-1.) node(22_0) [draw,shape=circle,color=gray] {22} --
111(1.,-2.) node(23_0) [draw,shape=circle,color=gray] {23} --
112(-1.,-2.) node(24_0) [draw,shape=circle,color=gray] {24} --
113(0,0);
114\draw[color=gray] (5_0) -- (24_0) -- (12_0) -- (13_0) -- (4_0) -- (16_0) -- (9_0) -- (17_0) -- (5_0);
115\draw[color=gray] (12_0) -- (23_0) -- (8_0) -- (22_0) -- (11_0) -- (14_0) -- (4_0) -- (13_0) -- (12_0);
116\draw[color=gray] (4_0) -- (14_0) -- (11_0) -- (21_0) -- (7_0) -- (20_0) -- (10_0) -- (15_0) -- (4_0);
117\draw[color=gray] (9_0) -- (16_0) -- (4_0) -- (15_0) -- (10_0) -- (19_0) -- (6_0) -- (18_0) -- (9_0);
118\path (-1.,-1.) node(0_0) [] {};
119\path (1.,-1.) node(1_0) [] {};
120\path (1.,1.) node(2_0) [] {};
121\path (-1.,1.) node(3_0) [] {};
122\end{tikzpicture}
123\end{document}
124quadrilateral orientation -1
125\documentclass[tikz]{standalone}
126
127\usepackage{pgflibraryshapes}
128\usetikzlibrary{backgrounds}
129\usetikzlibrary{arrows}
130\begin{document}
131\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
132\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
133\path (-2.,2.) node(5_0) [draw,shape=circle,color=gray] {5};
134\path (2.,2.) node(6_0) [draw,shape=circle,color=gray] {6};
135\path (2.,-2.) node(7_0) [draw,shape=circle,color=gray] {7};
136\path (-2.,-2.) node(8_0) [draw,shape=circle,color=gray] {8};
137\path (0.,2.) node(9_0) [draw,shape=circle,color=gray] {9};
138\path (2.,0.) node(10_0) [draw,shape=circle,color=gray] {10};
139\path (0.,-2.) node(11_0) [draw,shape=circle,color=gray] {11};
140\path (-2.,0.) node(12_0) [draw,shape=circle,color=gray] {12};
141\path
142(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
143(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
144(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
145(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
146(-1.,2.) node(17_0) [draw,shape=circle,color=gray] {17} --
147(1.,2.) node(18_0) [draw,shape=circle,color=gray] {18} --
148(2.,1.) node(19_0) [draw,shape=circle,color=gray] {19} --
149(2.,-1.) node(20_0) [draw,shape=circle,color=gray] {20} --
150(1.,-2.) node(21_0) [draw,shape=circle,color=gray] {21} --
151(-1.,-2.) node(22_0) [draw,shape=circle,color=gray] {22} --
152(-2.,-1.) node(23_0) [draw,shape=circle,color=gray] {23} --
153(-2.,1.) node(24_0) [draw,shape=circle,color=gray] {24} --
154(0,0);
155\draw[color=gray] (8_0) -- (22_0) -- (11_0) -- (13_0) -- (4_0) -- (16_0) -- (12_0) -- (23_0) -- (8_0);
156\draw[color=gray] (11_0) -- (21_0) -- (7_0) -- (20_0) -- (10_0) -- (14_0) -- (4_0) -- (13_0) -- (11_0);
157\draw[color=gray] (4_0) -- (14_0) -- (10_0) -- (19_0) -- (6_0) -- (18_0) -- (9_0) -- (15_0) -- (4_0);
158\draw[color=gray] (12_0) -- (16_0) -- (4_0) -- (15_0) -- (9_0) -- (17_0) -- (5_0) -- (24_0) -- (12_0);
159\path (-1.,-1.) node(0_0) [] {};
160\path (1.,-1.) node(1_0) [] {};
161\path (1.,1.) node(2_0) [] {};
162\path (-1.,1.) node(3_0) [] {};
163\end{tikzpicture}
164\end{document}
165quadrilateral orientation 0
166\documentclass[tikz]{standalone}
167
168\usepackage{pgflibraryshapes}
169\usetikzlibrary{backgrounds}
170\usetikzlibrary{arrows}
171\begin{document}
172\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
173\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
174\path (-2.,-2.) node(5_0) [draw,shape=circle,color=gray] {5};
175\path (2.,-2.) node(6_0) [draw,shape=circle,color=gray] {6};
176\path (2.,2.) node(7_0) [draw,shape=circle,color=gray] {7};
177\path (-2.,2.) node(8_0) [draw,shape=circle,color=gray] {8};
178\path (0.,-2.) node(9_0) [draw,shape=circle,color=gray] {9};
179\path (2.,0.) node(10_0) [draw,shape=circle,color=gray] {10};
180\path (0.,2.) node(11_0) [draw,shape=circle,color=gray] {11};
181\path (-2.,0.) node(12_0) [draw,shape=circle,color=gray] {12};
182\path
183(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
184(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
185(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
186(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
187(-1.,-2.) node(17_0) [draw,shape=circle,color=gray] {17} --
188(1.,-2.) node(18_0) [draw,shape=circle,color=gray] {18} --
189(2.,-1.) node(19_0) [draw,shape=circle,color=gray] {19} --
190(2.,1.) node(20_0) [draw,shape=circle,color=gray] {20} --
191(1.,2.) node(21_0) [draw,shape=circle,color=gray] {21} --
192(-1.,2.) node(22_0) [draw,shape=circle,color=gray] {22} --
193(-2.,1.) node(23_0) [draw,shape=circle,color=gray] {23} --
194(-2.,-1.) node(24_0) [draw,shape=circle,color=gray] {24} --
195(0,0);
196\draw[color=gray] (5_0) -- (17_0) -- (9_0) -- (13_0) -- (4_0) -- (16_0) -- (12_0) -- (24_0) -- (5_0);
197\draw[color=gray] (9_0) -- (18_0) -- (6_0) -- (19_0) -- (10_0) -- (14_0) -- (4_0) -- (13_0) -- (9_0);
198\draw[color=gray] (4_0) -- (14_0) -- (10_0) -- (20_0) -- (7_0) -- (21_0) -- (11_0) -- (15_0) -- (4_0);
199\draw[color=gray] (12_0) -- (16_0) -- (4_0) -- (15_0) -- (11_0) -- (22_0) -- (8_0) -- (23_0) -- (12_0);
200\path (-1.,-1.) node(0_0) [] {};
201\path (1.,-1.) node(1_0) [] {};
202\path (1.,1.) node(2_0) [] {};
203\path (-1.,1.) node(3_0) [] {};
204\end{tikzpicture}
205\end{document}
206quadrilateral orientation 1
207\documentclass[tikz]{standalone}
208
209\usepackage{pgflibraryshapes}
210\usetikzlibrary{backgrounds}
211\usetikzlibrary{arrows}
212\begin{document}
213\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
214\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
215\path (-2.,2.) node(5_0) [draw,shape=circle,color=gray] {5};
216\path (-2.,-2.) node(6_0) [draw,shape=circle,color=gray] {6};
217\path (2.,-2.) node(7_0) [draw,shape=circle,color=gray] {7};
218\path (2.,2.) node(8_0) [draw,shape=circle,color=gray] {8};
219\path (-2.,0.) node(9_0) [draw,shape=circle,color=gray] {9};
220\path (0.,-2.) node(10_0) [draw,shape=circle,color=gray] {10};
221\path (2.,0.) node(11_0) [draw,shape=circle,color=gray] {11};
222\path (0.,2.) node(12_0) [draw,shape=circle,color=gray] {12};
223\path
224(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
225(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
226(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
227(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
228(-2.,1.) node(17_0) [draw,shape=circle,color=gray] {17} --
229(-2.,-1.) node(18_0) [draw,shape=circle,color=gray] {18} --
230(-1.,-2.) node(19_0) [draw,shape=circle,color=gray] {19} --
231(1.,-2.) node(20_0) [draw,shape=circle,color=gray] {20} --
232(2.,-1.) node(21_0) [draw,shape=circle,color=gray] {21} --
233(2.,1.) node(22_0) [draw,shape=circle,color=gray] {22} --
234(1.,2.) node(23_0) [draw,shape=circle,color=gray] {23} --
235(-1.,2.) node(24_0) [draw,shape=circle,color=gray] {24} --
236(0,0);
237\draw[color=gray] (6_0) -- (19_0) -- (10_0) -- (13_0) -- (4_0) -- (16_0) -- (9_0) -- (18_0) -- (6_0);
238\draw[color=gray] (10_0) -- (20_0) -- (7_0) -- (21_0) -- (11_0) -- (14_0) -- (4_0) -- (13_0) -- (10_0);
239\draw[color=gray] (4_0) -- (14_0) -- (11_0) -- (22_0) -- (8_0) -- (23_0) -- (12_0) -- (15_0) -- (4_0);
240\draw[color=gray] (9_0) -- (16_0) -- (4_0) -- (15_0) -- (12_0) -- (24_0) -- (5_0) -- (17_0) -- (9_0);
241\path (-1.,-1.) node(0_0) [] {};
242\path (1.,-1.) node(1_0) [] {};
243\path (1.,1.) node(2_0) [] {};
244\path (-1.,1.) node(3_0) [] {};
245\end{tikzpicture}
246\end{document}
247quadrilateral orientation 2
248\documentclass[tikz]{standalone}
249
250\usepackage{pgflibraryshapes}
251\usetikzlibrary{backgrounds}
252\usetikzlibrary{arrows}
253\begin{document}
254\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
255\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
256\path (2.,2.) node(5_0) [draw,shape=circle,color=gray] {5};
257\path (-2.,2.) node(6_0) [draw,shape=circle,color=gray] {6};
258\path (-2.,-2.) node(7_0) [draw,shape=circle,color=gray] {7};
259\path (2.,-2.) node(8_0) [draw,shape=circle,color=gray] {8};
260\path (0.,2.) node(9_0) [draw,shape=circle,color=gray] {9};
261\path (-2.,0.) node(10_0) [draw,shape=circle,color=gray] {10};
262\path (0.,-2.) node(11_0) [draw,shape=circle,color=gray] {11};
263\path (2.,0.) node(12_0) [draw,shape=circle,color=gray] {12};
264\path
265(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
266(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
267(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
268(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
269(1.,2.) node(17_0) [draw,shape=circle,color=gray] {17} --
270(-1.,2.) node(18_0) [draw,shape=circle,color=gray] {18} --
271(-2.,1.) node(19_0) [draw,shape=circle,color=gray] {19} --
272(-2.,-1.) node(20_0) [draw,shape=circle,color=gray] {20} --
273(-1.,-2.) node(21_0) [draw,shape=circle,color=gray] {21} --
274(1.,-2.) node(22_0) [draw,shape=circle,color=gray] {22} --
275(2.,-1.) node(23_0) [draw,shape=circle,color=gray] {23} --
276(2.,1.) node(24_0) [draw,shape=circle,color=gray] {24} --
277(0,0);
278\draw[color=gray] (7_0) -- (21_0) -- (11_0) -- (13_0) -- (4_0) -- (16_0) -- (10_0) -- (20_0) -- (7_0);
279\draw[color=gray] (11_0) -- (22_0) -- (8_0) -- (23_0) -- (12_0) -- (14_0) -- (4_0) -- (13_0) -- (11_0);
280\draw[color=gray] (4_0) -- (14_0) -- (12_0) -- (24_0) -- (5_0) -- (17_0) -- (9_0) -- (15_0) -- (4_0);
281\draw[color=gray] (10_0) -- (16_0) -- (4_0) -- (15_0) -- (9_0) -- (18_0) -- (6_0) -- (19_0) -- (10_0);
282\path (-1.,-1.) node(0_0) [] {};
283\path (1.,-1.) node(1_0) [] {};
284\path (1.,1.) node(2_0) [] {};
285\path (-1.,1.) node(3_0) [] {};
286\end{tikzpicture}
287\end{document}
288quadrilateral orientation 3
289\documentclass[tikz]{standalone}
290
291\usepackage{pgflibraryshapes}
292\usetikzlibrary{backgrounds}
293\usetikzlibrary{arrows}
294\begin{document}
295\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont]
296\path (0.,0.) node(4_0) [draw,shape=circle,color=gray] {4};
297\path (2.,-2.) node(5_0) [draw,shape=circle,color=gray] {5};
298\path (2.,2.) node(6_0) [draw,shape=circle,color=gray] {6};
299\path (-2.,2.) node(7_0) [draw,shape=circle,color=gray] {7};
300\path (-2.,-2.) node(8_0) [draw,shape=circle,color=gray] {8};
301\path (2.,0.) node(9_0) [draw,shape=circle,color=gray] {9};
302\path (0.,2.) node(10_0) [draw,shape=circle,color=gray] {10};
303\path (-2.,0.) node(11_0) [draw,shape=circle,color=gray] {11};
304\path (0.,-2.) node(12_0) [draw,shape=circle,color=gray] {12};
305\path
306(0.,-1.) node(13_0) [draw,shape=circle,color=gray] {13} --
307(1.,0.) node(14_0) [draw,shape=circle,color=gray] {14} --
308(0.,1.) node(15_0) [draw,shape=circle,color=gray] {15} --
309(-1.,0.) node(16_0) [draw,shape=circle,color=gray] {16} --
310(2.,-1.) node(17_0) [draw,shape=circle,color=gray] {17} --
311(2.,1.) node(18_0) [draw,shape=circle,color=gray] {18} --
312(1.,2.) node(19_0) [draw,shape=circle,color=gray] {19} --
313(-1.,2.) node(20_0) [draw,shape=circle,color=gray] {20} --
314(-2.,1.) node(21_0) [draw,shape=circle,color=gray] {21} --
315(-2.,-1.) node(22_0) [draw,shape=circle,color=gray] {22} --
316(-1.,-2.) node(23_0) [draw,shape=circle,color=gray] {23} --
317(1.,-2.) node(24_0) [draw,shape=circle,color=gray] {24} --
318(0,0);
319\draw[color=gray] (8_0) -- (23_0) -- (12_0) -- (13_0) -- (4_0) -- (16_0) -- (11_0) -- (22_0) -- (8_0);
320\draw[color=gray] (12_0) -- (24_0) -- (5_0) -- (17_0) -- (9_0) -- (14_0) -- (4_0) -- (13_0) -- (12_0);
321\draw[color=gray] (4_0) -- (14_0) -- (9_0) -- (18_0) -- (6_0) -- (19_0) -- (10_0) -- (15_0) -- (4_0);
322\draw[color=gray] (11_0) -- (16_0) -- (4_0) -- (15_0) -- (10_0) -- (20_0) -- (7_0) -- (21_0) -- (11_0);
323\path (-1.,-1.) node(0_0) [] {};
324\path (1.,-1.) node(1_0) [] {};
325\path (1.,1.) node(2_0) [] {};
326\path (-1.,1.) node(3_0) [] {};
327\end{tikzpicture}
328\end{document}
329