Classroom course with limited seats and different memberships

I want to implement the below scenario:
-Classroom course with a limit of 20 students in the class
-Students can either pay weekly or monthly for this course
-The important thing is that at any given time the students don’t pass 20 students.

I tried to implement this logic using LearnPress and Paid membership pro doing the following:
-Created the course in LeanrPress with limit of 20 students
-Created 2 membership levels for this course (weekly and monthly)

The issue is that for some reason when I buy any of the membership levels, the course student count doesn’t increment, so this leads to the possibility of buying more than 20 memberships.

Is there any other way (paid/free) achieving such logic ?


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real analysis – Band limited initial data : Regularity for Navier Stokes Equation defined on a Torus $mathbb{T}^m$

Consider the Navier stokes equation and the Euler equation defined on a Torus(periodic solutions).
Let the dimensionality of the space $mathbb{T}^m$ be $mge 3$.

Link to the Problem.

Has it been investigated partially or conclusively, the regularity of the solutions when the initial data $u_0(x) = u(x,0)$ is a trigonometric polynomial of a certain degree?

References to any closely related research is also appreciated.

web application – Path traversal limited

I trying to pentest website, but I am new and confused Well!.

I know that there is files named for example :
file1 and file2.
And the server is nginx.

So I did this test:

[1] => 404

[2] => 200 + showed me the file2 so its work!

After this test I assume that the website is vulnerable.

So I did this test:

[1] => 400

[2] => 400

[3] I tried windows files and linux files…so I did a lot of tests.

As its show above I am not able to get files from outsite the website.

The question is is this consider vulnerable to path traversal even if I not able to get any file from outside of website.

Cryptocean Limited –

I’m not admin here!


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