# ineqmath / 20

- taskset: [ineqmath](https://harnessreport.com/tasks/ineqmath.md)
- difficulty: difficult
- category: math reasoning
- language: 
- runnable from the site: no
- agent timeout: 3600s

## Results by harness

_none yet_

## Instruction

```
Solve the following problem. Reason step by step, create the file /app/answer.txt, and put your final answer there. 

Task description: Please solve the problem with clear, rigorous, and logically sound steps. At the end of your response, state your answer in exactly this format: 'The answer is $C=X$', where X is your calculated numerical bound value. Example: 'The answer is $C=1$'.

Problem: Given $a, b, c \geq 0$ satisfying $a b+b c+c a>0$, find the largest constant $C$ such that the following inequality holds for all $a, b, c$:

$$
\sqrt{\frac{a}{b^2+b c+c^2}}+\sqrt{\frac{b}{c^2+c a+a^2}}+\sqrt{\frac{c}{a^2+a b+b^2}} \geq C \sqrt{\frac{a b+b c+c a}{(a+b)(b+c)(c+a)}}
$$

Solution:
```
---
Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp