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yearlove丶乐乐
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我想画出ri对rj的图像，但是查看了帮助，不知道用什么函数，ContourPlot试了以下，但是没有作用，所需画的隐函数如下：
纯文本：
-4 (2-2 b^2+b^2 Subscript[r, i]+(-2+b^2) Subscript[r, j]) (-m (c (2-2 b+b Subscript[r, i]+(-2+b) Subscript[r, j])+a (-1+Subscript[r, j]) (2-2 b+(-2+b) Subscript[r, i]+b Subscript[r, j])) (4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j]))+(-1+b) Subscript[r, i] (-c^2 (4 (-1+b^2)+(-2+b) b Subsuperscript[r, i, 2]-4 (-1+b+b^2) Subscript[r, j]+b (2+b) Subsuperscript[r, j, 2]+2 Subscript[r, i] (2+2 b-2 b^2+(-2+b^2) Subscript[r, j]))+a^2 (-1+Subscript[r, i]) (-1+Subscript[r, j]) (4 (-1+b^2)+b (2+b) Subsuperscript[r, i, 2]+(4+4 b-4 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (-1+b+b^2)+(-2+b^2) Subscript[r, j]))-a c (Subscript[r, i]-Subscript[r, j]) (4 (1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (1+b^2)+(2+b^2) Subscript[r, j]))))+(4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j])) (-2 m (2-2 b^2+b^2 Subscript[r, i]+(-2+b^2) Subscript[r, j]) (c (2-2 b+b Subscript[r, i]+(-2+b) Subscript[r, j])+a (-1+Subscript[r, j]) (2-2 b+(-2+b) Subscript[r, i]+b Subscript[r, j]))-m (b c+a (-2+b) (-1+Subscript[r, j])) (4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j]))+(-1+b) (-c^2 (4 (-1+b^2)+(-2+b) b Subsuperscript[r, i, 2]-4 (-1+b+b^2) Subscript[r, j]+b (2+b) Subsuperscript[r, j, 2]+2 Subscript[r, i] (2+2 b-2 b^2+(-2+b^2) Subscript[r, j]))+a^2 (-1+Subscript[r, i]) (-1+Subscript[r, j]) (4 (-1+b^2)+b (2+b) Subsuperscript[r, i, 2]+(4+4 b-4 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (-1+b+b^2)+(-2+b^2) Subscript[r, j]))-a c (Subscript[r, i]-Subscript[r, j]) (4 (1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (1+b^2)+(2+b^2) Subscript[r, j])))+(-1+b) Subscript[r, i] (-2 c^2 (2+2 b-2 b^2+(-2+b) b Subscript[r, i]+(-2+b^2) Subscript[r, j])+a^2 (-1+Subscript[r, j]) (4 (-2+b+2 b^2)
+3
b (2+b) Subsuperscript[r, i, 2]+(8+4 b-6 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (4-6 b-5 b^2+2 (-2+b^2) Subscript[r, j]))+a c (-4 (1+b^2)-3 b^2 Subsuperscript[r, i, 2]+(4+b^2) Subsuperscript[r, j, 2]+Subscript[r, i] (8 (1+b^2)-2 (4+b^2) Subscript[r, j]))))==0
LaTeX：
\left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right) \left(-2 m \left(r_i b^2-2 b^2+\left(b^2-2\right) r_j+2\right) \left(c \left(r_i b-2 b+(b-2) r_j+2\right)+a \left(r_j-1\right) \left(r_j b-2 b+(b-2) r_i+2\right)\right)-m \left(b c+a (b-2) \left(r_j-1\right)\right) \left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right)+(b-1) \left(\left(r_i-1\right) \left(r_j-1\right) \left(b (b+2) r_i^2+2 \left(\left(b^2-2\right) r_j-2 \left(b^2+b-1\right)\right) r_i+(b-2) b r_j^2+4 \left(b^2-1\right)+\left(-4 b^2+4 b+4\right) r_j\right) a^2-c \left(r_i-r_j\right) \left(b^2 r_i^2+2 \left(\left(b^2+2\right) r_j-2 \left(b^2+1\right)\right) r_i+b^2 r_j^2+4 \left(b^2+1\right)-4 \left(b^2+1\right) r_j\right) a-c^2 \left((b-2) b r_i^2+2 \left(-2 b^2+2 b+\left(b^2-2\right) r_j+2\right) r_i+b (b+2) r_j^2+4 \left(b^2-1\right)-4 \left(b^2+b-1\right) r_j\right)\right)+(b-1) r_i \left(\left(r_j-1\right) \left(3 b (b+2) r_i^2+2 \left(-5 b^2-6 b+2 \left(b^2-2\right) r_j+4\right) r_i+(b-2) b r_j^2+4 \left(2 b^2+b-2\right)+\left(-6 b^2+4 b+8\right) r_j\right) a^2+c \left(-3 b^2 r_i^2+\left(8 \left(b^2+1\right)-2 \left(b^2+4\right) r_j\right) r_i+\left(b^2+4\right) r_j^2-4 \left(b^2+1\right)\right) a-2 c^2 \left(-2 b^2+(b-2) r_i b+2 b+\left(b^2-2\right) r_j+2\right)\right)\right)-4 \left(r_i b^2-2 b^2+\left(b^2-2\right) r_j+2\right) \left((b-1) r_i \left(\left(r_i-1\right) \left(r_j-1\right) \left(b (b+2) r_i^2+2 \left(\left(b^2-2\right) r_j-2 \left(b^2+b-1\right)\right) r_i+(b-2) b r_j^2+4 \left(b^2-1\right)+\left(-4 b^2+4 b+4\right) r_j\right) a^2-c \left(r_i-r_j\right) \left(b^2 r_i^2+2 \left(\left(b^2+2\right) r_j-2 \left(b^2+1\right)\right) r_i+b^2 r_j^2+4 \left(b^2+1\right)-4 \left(b^2+1\right) r_j\right) a-c^2 \left((b-2) b r_i^2+2 \left(-2 b^2+2 b+\left(b^2-2\right) r_j+2\right) r_i+b (b+2) r_j^2+4 \left(b^2-1\right)-4 \left(b^2+b-1\right) r_j\right)\right)-m \left(c \left(r_i b-2 b+(b-2) r_j+2\right)+a \left(r_j-1\right) \left(r_j b-2 b+(b-2) r_i+2\right)\right) \left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right)\right)=0
2022年01月04日 16点01分
1
纯文本：
-4 (2-2 b^2+b^2 Subscript[r, i]+(-2+b^2) Subscript[r, j]) (-m (c (2-2 b+b Subscript[r, i]+(-2+b) Subscript[r, j])+a (-1+Subscript[r, j]) (2-2 b+(-2+b) Subscript[r, i]+b Subscript[r, j])) (4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j]))+(-1+b) Subscript[r, i] (-c^2 (4 (-1+b^2)+(-2+b) b Subsuperscript[r, i, 2]-4 (-1+b+b^2) Subscript[r, j]+b (2+b) Subsuperscript[r, j, 2]+2 Subscript[r, i] (2+2 b-2 b^2+(-2+b^2) Subscript[r, j]))+a^2 (-1+Subscript[r, i]) (-1+Subscript[r, j]) (4 (-1+b^2)+b (2+b) Subsuperscript[r, i, 2]+(4+4 b-4 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (-1+b+b^2)+(-2+b^2) Subscript[r, j]))-a c (Subscript[r, i]-Subscript[r, j]) (4 (1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (1+b^2)+(2+b^2) Subscript[r, j]))))+(4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j])) (-2 m (2-2 b^2+b^2 Subscript[r, i]+(-2+b^2) Subscript[r, j]) (c (2-2 b+b Subscript[r, i]+(-2+b) Subscript[r, j])+a (-1+Subscript[r, j]) (2-2 b+(-2+b) Subscript[r, i]+b Subscript[r, j]))-m (b c+a (-2+b) (-1+Subscript[r, j])) (4 (-1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (-1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (2-2 b^2+(-2+b^2) Subscript[r, j]))+(-1+b) (-c^2 (4 (-1+b^2)+(-2+b) b Subsuperscript[r, i, 2]-4 (-1+b+b^2) Subscript[r, j]+b (2+b) Subsuperscript[r, j, 2]+2 Subscript[r, i] (2+2 b-2 b^2+(-2+b^2) Subscript[r, j]))+a^2 (-1+Subscript[r, i]) (-1+Subscript[r, j]) (4 (-1+b^2)+b (2+b) Subsuperscript[r, i, 2]+(4+4 b-4 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (-1+b+b^2)+(-2+b^2) Subscript[r, j]))-a c (Subscript[r, i]-Subscript[r, j]) (4 (1+b^2)+b^2 Subsuperscript[r, i, 2]-4 (1+b^2) Subscript[r, j]+b^2 Subsuperscript[r, j, 2]+2 Subscript[r, i] (-2 (1+b^2)+(2+b^2) Subscript[r, j])))+(-1+b) Subscript[r, i] (-2 c^2 (2+2 b-2 b^2+(-2+b) b Subscript[r, i]+(-2+b^2) Subscript[r, j])+a^2 (-1+Subscript[r, j]) (4 (-2+b+2 b^2)
+3
b (2+b) Subsuperscript[r, i, 2]+(8+4 b-6 b^2) Subscript[r, j]+(-2+b) b Subsuperscript[r, j, 2]+2 Subscript[r, i] (4-6 b-5 b^2+2 (-2+b^2) Subscript[r, j]))+a c (-4 (1+b^2)-3 b^2 Subsuperscript[r, i, 2]+(4+b^2) Subsuperscript[r, j, 2]+Subscript[r, i] (8 (1+b^2)-2 (4+b^2) Subscript[r, j]))))==0
LaTeX：
\left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right) \left(-2 m \left(r_i b^2-2 b^2+\left(b^2-2\right) r_j+2\right) \left(c \left(r_i b-2 b+(b-2) r_j+2\right)+a \left(r_j-1\right) \left(r_j b-2 b+(b-2) r_i+2\right)\right)-m \left(b c+a (b-2) \left(r_j-1\right)\right) \left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right)+(b-1) \left(\left(r_i-1\right) \left(r_j-1\right) \left(b (b+2) r_i^2+2 \left(\left(b^2-2\right) r_j-2 \left(b^2+b-1\right)\right) r_i+(b-2) b r_j^2+4 \left(b^2-1\right)+\left(-4 b^2+4 b+4\right) r_j\right) a^2-c \left(r_i-r_j\right) \left(b^2 r_i^2+2 \left(\left(b^2+2\right) r_j-2 \left(b^2+1\right)\right) r_i+b^2 r_j^2+4 \left(b^2+1\right)-4 \left(b^2+1\right) r_j\right) a-c^2 \left((b-2) b r_i^2+2 \left(-2 b^2+2 b+\left(b^2-2\right) r_j+2\right) r_i+b (b+2) r_j^2+4 \left(b^2-1\right)-4 \left(b^2+b-1\right) r_j\right)\right)+(b-1) r_i \left(\left(r_j-1\right) \left(3 b (b+2) r_i^2+2 \left(-5 b^2-6 b+2 \left(b^2-2\right) r_j+4\right) r_i+(b-2) b r_j^2+4 \left(2 b^2+b-2\right)+\left(-6 b^2+4 b+8\right) r_j\right) a^2+c \left(-3 b^2 r_i^2+\left(8 \left(b^2+1\right)-2 \left(b^2+4\right) r_j\right) r_i+\left(b^2+4\right) r_j^2-4 \left(b^2+1\right)\right) a-2 c^2 \left(-2 b^2+(b-2) r_i b+2 b+\left(b^2-2\right) r_j+2\right)\right)\right)-4 \left(r_i b^2-2 b^2+\left(b^2-2\right) r_j+2\right) \left((b-1) r_i \left(\left(r_i-1\right) \left(r_j-1\right) \left(b (b+2) r_i^2+2 \left(\left(b^2-2\right) r_j-2 \left(b^2+b-1\right)\right) r_i+(b-2) b r_j^2+4 \left(b^2-1\right)+\left(-4 b^2+4 b+4\right) r_j\right) a^2-c \left(r_i-r_j\right) \left(b^2 r_i^2+2 \left(\left(b^2+2\right) r_j-2 \left(b^2+1\right)\right) r_i+b^2 r_j^2+4 \left(b^2+1\right)-4 \left(b^2+1\right) r_j\right) a-c^2 \left((b-2) b r_i^2+2 \left(-2 b^2+2 b+\left(b^2-2\right) r_j+2\right) r_i+b (b+2) r_j^2+4 \left(b^2-1\right)-4 \left(b^2+b-1\right) r_j\right)\right)-m \left(c \left(r_i b-2 b+(b-2) r_j+2\right)+a \left(r_j-1\right) \left(r_j b-2 b+(b-2) r_i+2\right)\right) \left(b^2 r_i^2+2 \left(-2 b^2+\left(b^2-2\right) r_j+2\right) r_i+b^2 r_j^2+4 \left(b^2-1\right)-4 \left(b^2-1\right) r_j\right)\right)=0
