Goodarz Mehr
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 Sep 28 awarded Yearling Sep 16 comment 5 moving points in plane, one goes to infinity Nice construction, but you didn't notice the condition that No three of the lines should intersect in one point. Without this condition, making an example for $5$ is also easy, just consider $5$ points on sides and one diagonal of a square. Sep 16 comment 5 moving points in plane, one goes to infinity @Feanor: would you please show us your construction? Thanks a lot. Sep 14 awarded Nice Question Sep 12 revised 5 moving points in plane, one goes to infinity Adding the non-zero speed condition Sep 12 comment 5 moving points in plane, one goes to infinity @rattle: no, it's not allowed. Sep 12 comment 5 moving points in plane, one goes to infinity @alex.jordan: I meant that only at the initial position, non of the points is an intersection point of two lines. It's obvious when they start moving, they may meet each other. Sep 11 comment 5 moving points in plane, one goes to infinity To your first question, yes. Each point has it's own track. Also, each point move at its own distinct constant speed. Sep 11 asked 5 moving points in plane, one goes to infinity Aug 12 comment Minimum number of circles in a rectangle with no line in rectangle not intersecting any of them Thanks, edited. Also it suffices to cover two diagonals to have each line intersecting at least one of them, but I'm intersected in the minimum number of such circles. Aug 12 revised Minimum number of circles in a rectangle with no line in rectangle not intersecting any of them edited title Aug 11 asked Minimum number of circles in a rectangle with no line in rectangle not intersecting any of them Jun 8 awarded Constituent Jun 8 awarded Caucus May 15 comment Identical colored squares in plane Thanks!In fact, first of all I found the problem in that article! May 14 comment How many ways to paint a rectangle You may also see this one: math.stackexchange.com/questions/112565/… , which is a harder problem! May 14 accepted coloring a $4\times 4$ square with $4$ colors May 7 asked Points and lines covering them May 6 asked Odd number of members, odd number of intersections Apr 27 awarded Benefactor