2 replaced http://mathoverflow.net/ with https://mathoverflow.net/
source | link

The two sites are meant for very different audiences, and have very different types of questions.

From the MathOverflow faqMathOverflow faq:

MathOverflow's primary goal is for users to ask and answer research level math questions, the sorts of questions you come across when you're writing or reading articles or graduate level books.

From the Area51 page for math.stackexchange:

Q&A site for people studying math at any level & professionals in related fields

Why separate the two? The community at MathOverflow is not interested in the typical question here. It is too elementary, and they don't want to be flooded with people asking basic math questions. Conversely, most MathOverflow questions would not be well suited to the audience here. Many may not even be comprehensible! The concentration of professional mathematicians is too low (or will be after the site goes public, anyways), and the questions are not interesting to most people without graduate-level coursework in math.
Of course, there are plenty of exceptions to the above. Especially in the closed beta, there will be substantial overlap between the two sites, in terms of users, anyway. The distinction will probably be a lot more clear once the site goes public.

The two sites are meant for very different audiences, and have very different types of questions.

From the MathOverflow faq:

MathOverflow's primary goal is for users to ask and answer research level math questions, the sorts of questions you come across when you're writing or reading articles or graduate level books.

From the Area51 page for math.stackexchange:

Q&A site for people studying math at any level & professionals in related fields

Why separate the two? The community at MathOverflow is not interested in the typical question here. It is too elementary, and they don't want to be flooded with people asking basic math questions. Conversely, most MathOverflow questions would not be well suited to the audience here. Many may not even be comprehensible! The concentration of professional mathematicians is too low (or will be after the site goes public, anyways), and the questions are not interesting to most people without graduate-level coursework in math.
Of course, there are plenty of exceptions to the above. Especially in the closed beta, there will be substantial overlap between the two sites, in terms of users, anyway. The distinction will probably be a lot more clear once the site goes public.

The two sites are meant for very different audiences, and have very different types of questions.

From the MathOverflow faq:

MathOverflow's primary goal is for users to ask and answer research level math questions, the sorts of questions you come across when you're writing or reading articles or graduate level books.

From the Area51 page for math.stackexchange:

Q&A site for people studying math at any level & professionals in related fields

Why separate the two? The community at MathOverflow is not interested in the typical question here. It is too elementary, and they don't want to be flooded with people asking basic math questions. Conversely, most MathOverflow questions would not be well suited to the audience here. Many may not even be comprehensible! The concentration of professional mathematicians is too low (or will be after the site goes public, anyways), and the questions are not interesting to most people without graduate-level coursework in math.
Of course, there are plenty of exceptions to the above. Especially in the closed beta, there will be substantial overlap between the two sites, in terms of users, anyway. The distinction will probably be a lot more clear once the site goes public.

1
source | link

The two sites are meant for very different audiences, and have very different types of questions.

From the MathOverflow faq:

MathOverflow's primary goal is for users to ask and answer research level math questions, the sorts of questions you come across when you're writing or reading articles or graduate level books.

From the Area51 page for math.stackexchange:

Q&A site for people studying math at any level & professionals in related fields

Why separate the two? The community at MathOverflow is not interested in the typical question here. It is too elementary, and they don't want to be flooded with people asking basic math questions. Conversely, most MathOverflow questions would not be well suited to the audience here. Many may not even be comprehensible! The concentration of professional mathematicians is too low (or will be after the site goes public, anyways), and the questions are not interesting to most people without graduate-level coursework in math.
Of course, there are plenty of exceptions to the above. Especially in the closed beta, there will be substantial overlap between the two sites, in terms of users, anyway. The distinction will probably be a lot more clear once the site goes public.