我知道了，我找错地方了。playground里面的chat和chatGPT不是同一个，chatGPT的回答远比playground里面的详细。但是并非没有错误，我又试了一次，这次给了4段，但是……

What is a nonholonomic system?
A nonholonomic system is a type of system in which constraints on motion cannot be expressed as integrable differentiable equations. In other words, the system cannot be described by a set of equations that can be integrated to give a unique solution for the system's motion.

The key feature of nonholonomic systems is that they have constraints on motion that are non-integrable. This means that the constraints cannot be derived from a scalar function of the system's state variables, which is a requirement for a system to be holonomic.

A common example of a nonholonomic system is a wheeled vehicle, such as a car or a robot with wheels. The motion of the vehicle is subject to constraints that depend on the orientation of the wheels, such as the fact that the wheels can only move in the direction they are facing. These constraints are non-integrable, and therefore the motion of the vehicle cannot be described using holonomic equations of motion.

Nonholonomic systems are of interest in many areas of physics and engineering, including robotics, control theory, and mathematical physics. They often require specialized techniques for analysis and control, such as the use of differential geometry and geometric control theory.

第一段和第3段是错的。。。第一段错的原因在于，把可解性的“可积”跟 frobenius意义下的可积 搞混了，严格的说这是数学界的锅，因为有一大坨不同定义的“可积”，多数数学家在默认读者已经知道了是哪个的情况下，只写“integral”，不注意很容易搞错，所以AI在这里无从分辨。
第三段的结论是对的，但是原因纯属胡扯，不懂装懂

【 在 vinbo 的大作中提到: 】
: 我问的每次都只给一段，而且是错的定义。你的为啥有三段？我把字数限制已经放开了啊？
:
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修改:vinbo FROM 211.161.244.*
FROM 211.161.244.*

需要fq啦
【 在 Soar 的大作中提到: 】
: 搞歧视
: Not available
: OpenAI's services are not available in your country.
--
FROM 211.161.244.*

嗯，后来我也发现了。这两天openai的服务器被撑爆了，昨天就问了几句就一直报错，搜了一下，结果大家都在报错。今天登陆一看，报错页面变好看了。。。。。。

【 在 danssion 的大作中提到: 】
: 你这个不是  chatGPT
: 这个是 GPT
:
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FROM 211.161.244.*

力学习题很多都要画图的吧？有能用文字表述的力学习题吗？
【 在 vinbo 的大作中提到: 】
: 我觉得大家可以测试一下chatGPT做力学习题的本事，或者有限元受力分析的水平，或者编程水平
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FROM 136.56.37.*

第一小问答对，第二小问答错。
【 在 vinbo 的大作中提到: 】
: 肯定有啊，你找本习题集来翻翻看
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FROM 136.56.37.*