I noticed this first over at Chinese.SE and it turns out it was reported 5 months ago on meta.SE. A Quora user Dex Jackson is copy/pasting large numbers of question titles from Stack Exchange onto Quora; this user's activity page is like a plagiarism livestream.
I again reported this to Stack Exchange, but I'm not expecting much of a response. I went to Quora, flagging multitudes of posts, filled in complaint forms, and providing answers linking to the original question, but this eventually got me banned from Quora; they seem disinterested in fixing their problem.
This Quora user is plagiarizing material Stack Exchange wide. Some recent math.SE posts are:
Math.SE (Jul 3 at 18:35): What is the derivative of the following kernel function
Quora (2m ago): What is the derivative of the following kernel function (calculus, matrices, derivatives, matrix calculus, matrix decomposition, math)?Math.SE (50 mins ago): Proof of Hoffman & Kruskal's theorem on Unimodularity and Integrality.
Quora (28m ago): How do you provide a proof of Hoffman and Kruskal's theorem on Unimodularity and Integrality. (optimization, proof explanation, linear programming, integer programming, mixed integer, programming, math)?Math.SE (1 hour ago): basic linear algebra eigenvalue inequality
Quora (1h ago): How do you approach basic linear algebra eigenvalue inequality skepticism (linear algebra, eigenvalues, eigenvectors, math)?Math.SE (2 hours ago): Reflecting over y=−x
Quora (1h ago): How do you reflect over $y= x$ promptly (transformation, reflection, and math)?Math.SE (4 hours ago): diffeomorphism and integration by transformation rate
Quora (2h ago): How do you establish the diffeomorphism and integration by transformation rate (analysis, math)?Math.SE (21 hours ago): How do I solve a quadratic where x is in the denominator, x2−4x−3=0? [closed]
Quora (17h ago): How do you solve a quadratic where $x$ is in the denominator, $x^2 \frac {4} {x} 3=0$ (algebra precalculus, math)?
Quora (again) (3h ago): How do you solve a quadratic where $x$ is in the denominator, $x^2 \frac {4} {x} 3=0$ (algebra, precalculus, math)?Math.SE (17 hours ago): Find the constant term in (x+1+1/x)7 [closed]
Quora (3h ago): How do you find the constant term in (x+1+1/x) ^7 (binomial theorem, math)?Math.SE (17 hours ago): Hadamard's formula and the Fibonacci sequence?
Quora (15h ago): How is Hadamard's formula applied to the Fibonacci sequence (sequences, series, convergence, divergence, math)?Math.SE (18 hours ago): Calculating end point coordinates
Quora (17h ago): How do you calculate end point coordinates (geometry, trigonometry, quadratics, coordinate systems, math)?Math.SE (18 hours ago): Puzzle about a spinning table with a coin on each corner.
Quora (18h ago): How do you handle a puzzle about a spinning table with a coin on each corner (combinatorics, combinations, puzzles binary, math)?Math.SE (19 hours ago): Computing the homotopy type of the total space of a fiber bundle
Quora (18h ago): How do you compute the homotopy type of the total space of a fiber bundle (algebraic topology, homology, cohomology, fundamental groups, math)?Math.SE (yesterday): Solve the inequality |3x−5|−|2x+3|>0
Quora (18h ago): How do you solve the inequality $|3x 5| |2x+3| >0$ (contextual inequality, absolute value, math)?
I just want to alert you to this.