Erro numérico, também conhecido como instabilidade numérica, is a term used in matemática computacional and ciência da computação to describe the discrepancy between a computed value and its true or exact value. This error can occur during various numerical computations, such as in algorithms for solving equations, performing statistical analyses, or processing data in aprendizado de máquina.
Numerical errors generally arise from two main sources: truncation errors and round-off errors. Truncation errors occur when an infinite process is approximated by a finite one, such as when using a finite number of terms in a series expansion. Round-off errors, on the other hand, happen when numbers are rounded to fit within the limits of machine precision, which can lead to small inaccuracies that accumulate during calculations.
No contexto de inteligência artificial and numerical computing, managing numerical errors is crucial. For instance, in machine learning, slight numerical inaccuracies can impact model training and prediction accuracy. Techniques to manage numerical errors include using higher precision arithmetic, optimizing algorithms to minimize the impact of errors, and implementing robust error-checking mechanisms.
Understanding and mitigating numerical error is vital for ensuring the reliability and accuracy of computational results, especially in fields that rely heavily on numerical methods, such as computação científica, engineering, and data analysis.