Dear Alexei ... prove next interesting fact. ... P_A the point on the line PA such that IA is the bisector (internal or external) of angle PIP_A. The points...
... Dear Eisso, I don't think we can do it with GeoGebra, but may be with Cinderella. For example, if I construct a) the intersections A and B of a given line...
Dear Alxei ... lines ... B', C'. ... is ... correct) ... cubic, ... axis ... involution ... three ... Lb ... Now, if we consider a line L with trilinear pole P...
Dear Alex, ... I found the construction Paul gave in http://www.math.fau.edu/yiu/TourOfTriangleGeometry/ \MAAFlorida37040428.pdf I did not remember seeing this...
Dear Jeff and Eisso ... M is a given point. The lines MA and MB intersect again the conic at A' and B' respectively; the polar line of M goes through AB' inter...
Dear Bernard, Jean-Pierre, Fred and friends, This is an update to an old message #11351: Re: [EMHL] Re: nested circlecevian triangles Three years later and I'm...
Dear Jean-Pierre, I'm still in Chapter 1 and don't yet know the gradient and the hessian matrices. I should have a geometric feel for where I'm going, can you ...
Dear Jeff! CEMI is Central Economico-Mathematical Institute. I don't know why it is added to the head of mail. Sincerely...
Alexey.A.Zaslavsky
zasl@...
Jul 7, 2008 5:56 am
16530
Dear Jean-Pierre, Eisso and friends, Okay, I just got the isogonjugation working properly and I have the axes of the conic using the method outlined by Eisso....
Jeff, now that you can construct dual lines and points, you can use the fact that for any line and any given conic section, the latter defines an involution on...
Dear friends, What a "tour de force" as Francois might say. Which brings me back to my original question: I am trying to draw a circle centered at O which...
Dear friends, Eisso gave me one solution for the intersection of a point and a conic. As there exists more than one way to construct the axes of a conic, I...
Dear friends, I plan to visit New York very soon, Feel free to indicate some mandatory place to be visited for a triangle geometry/geometry/math/science lover....
I have just learned that Steve Sigur passed a few days ago. He posted more than 900 messages here. A few weeks ago, he worked with Colm Mulcahy to deliver...
I have just learned that Steve Sigur passed a few days ago. He posted more than 900 messages here. A few weeks ago, he worked with Colm Mulcahy to deliver all...
Dear friends I just go back to Paris to learn Steve Sigur has passed and now I remember all these wonderful messages he posted here for us. So he is still with...
In memory of Steve, here a little chow-chow riddle. So we start with our beloved triangle ABC in the affine real plane. On each side BC, CA, AB, we have 3...
Dear friends, It is with much sadness to learn of the passing of Steve Sigur, who has contributed much to this forum. I hope the Triangle Book he coauthored...
Dear Hyacinthists This is a very bad news. Steve was a very kind man, he was allways ready to bring his huge knowledge and his love of geometry. Thanks to him...
Dear Jeff When I was in Britanny, I missed all your questions about conic foci. I feel like poor Steve Sigur had answered here on this topic of foci ...
Steve Rest in Peace, dear Friend! Antreas PS: Hyacinthos Home Page Picture was changed: A photo of a geometer (it is Steve) with his students, instead of the...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
