[whoisburbansky]

Assuming OP was an undergrad, it’s totally fair to assume that the prof in question was trying to euphemistically say that they weren’t good enough for the class, especially since “mathematical maturity” is something of a term of art in the field. I don’t think it’s worth putting down teenagers for not understanding the nuances of every single bit of terminology in a field they’re dipping their toes into, the expectation should be that professors be more empathetic to that.

[trashtester]

"mathematical maturity" would be a combination of "not smart enough" and "haven't studied enough". Highly talented people can reach high levels of maturity very quickly, people who are just a bit above average can reach a reasonable maturity through hard study, and below average talent means it is very unlikely that the person will be able to comprehend university level theoretical math.

A teacher who doesn't know you will not know if you're not smart enough or just didnt study hard enough, and probably doesn't care much, especially for an undergrad. For a phd student, they may care if they think they've identified a "diamond in the rough" that can be turned into a gem with some work, but that is quite a bit beyond basic linear algebra.

[adolph]

> “mathematical maturity” is something of a term of art in the field

Fascinating, it sounds like "MM" is tacit knowledge, which begs the question why it isn't explicitly taught.

In mathematics, mathematical maturity is an informal term often used to refer to the quality of having a general understanding and mastery of the way mathematicians operate and communicate. It pertains to a mixture of mathematical experience and insight that cannot be directly taught. Instead, it comes from repeated exposure to mathematical concepts. It is a gauge of mathematics students' erudition in mathematical structures and methods, and can overlap with other related concepts such as mathematical intuition and mathematical competence. The topic is occasionally also addressed in literature in its own right.

https://en.wikipedia.org/wiki/Mathematical_maturity

[jimbokun]

If you understand the basic English meaning of "maturity", the intended meaning of "mathematical maturity" should be perfectly clear.

[CoastalCoder]

It was a part-time masters program, 2nd semester IIRC.