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**2024/576**

**Title:**

On complexity of the problem of solving systems of tropical polynomial equations of degree two

**Authors:**
Ivan Buchinskiy, Matvei Kotov, Alexander Treier

**Abstract:**

In this paper, we investigate the computational complexity of the problem of solving a one-sided system of equations of degree two of a special form over the max-plus algebra. Also, we consider the asymptotic density of solvable systems of this form. Such systems have appeared during the analysis of some tropical cryptography protocols that were recently suggested. We show how this problem is related to the integer linear programming problem and prove that this problem is NP-complete. We show that the asymptotic density of solvable systems of this form with some restrictions on the coefficients, the number of variables, and the number of equations is 0. As a corollary, we prove that this problem (with some restrictions on the coefficients, the number of variables, and the number of equations) is decidable generically in polynomial time.

**ePrint:**
https://eprint.iacr.org/2024/576

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