Does Min(d1,d2) Satisfy Triangle Inequality?

In summary, the Triangle Inequality is a fundamental geometric property that states the sum of any two side lengths of a triangle must be greater than the length of the third side. Min(d1,d2) refers to the minimum value between d1 and d2, and it is related to the Triangle Inequality as it can be restated as d1 + d2 > Min(d1,d2). This property is important in determining if a set of side lengths can form a triangle and has various applications in mathematics and science. Additionally, Min(d1,d2) will always satisfy the Triangle Inequality as it represents the smallest possible value between d1 and d2.
  • #1
Daveyboy
58
0
d1 and d2 are metrics on a space X. Does min(d1,d2) satisfy the triangle inequality.

I think it does not but I am having a hard time finding a counter example.
 
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  • #2
Try looking at the special case of the triangle inequality where equality holds.
 
  • #3
Oh neat this works: euclidean and discrete metric dmin(0,2)=1
dmin(0,1)=1
dmin(1,2)=1
does not satisfy the triangle inequality.
 
  • #4
dmin(0,2)<=dmin(0,1)+dmin(1,2). 1<=1+1. I think it does work.
 

1. What is the Triangle Inequality?

The Triangle Inequality is a fundamental geometric property that states that the sum of any two side lengths of a triangle must be greater than the length of the third side. Mathematically, it can be expressed as d1 + d2 > d3, where d1, d2, and d3 are the side lengths of the triangle.

2. What is Min(d1,d2)?

Min(d1,d2) refers to the minimum value between d1 and d2. In other words, it is the smallest of the two values.

3. How is Min(d1,d2) related to the Triangle Inequality?

The Triangle Inequality can be restated as d1 + d2 > Min(d1,d2). This means that the sum of two side lengths must be greater than the smaller of the two side lengths. This is a necessary condition for a figure to be considered a triangle.

4. Does Min(d1,d2) Satisfy Triangle Inequality for all values of d1 and d2?

Yes, Min(d1,d2) will always satisfy the Triangle Inequality as it represents the smallest possible value between d1 and d2. As long as d1 and d2 are positive numbers, Min(d1,d2) will be less than d1 + d2, satisfying the Triangle Inequality.

5. Why is the Triangle Inequality important?

The Triangle Inequality is important because it is a fundamental property of triangles and is used to determine if a given set of side lengths can form a triangle. It also has many applications in geometry, physics, and other branches of science.

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