Dear All My Friends, There is one special type of circumconic: the circumconic passing through one point P and its isogonal conjugate gP (I still don't know if...
... For years I have been calling this a "Mineur conic" after Adolph Mineur who studied it a long time ago. In addition to normal triangle symmetries, it has a...
Dear Steve and All My Friends, Thank you very much for your reference and advice message. I just also have found why we often see this configuration in ETC. It...
Dear friends It is very well known that orthopoles of diameters of the circumcircle are on the nine point circle but the converse is false! So I ask: What are...
Dear Francois in Hyacinthos #2651, I gave a construction of the Simson lines goingthrough a given point and of the lines with a given orthopole. Friendly....
Dear Fred Thanks a lot. I will look at your papers with great pleasure. Bouvaist's ideas are new for me! Friendly Francois [Non-text portions of this message...
... very nice result, and surprising. ... also nice. F to X to Y is a normal mapping of points from conic to conic, usually a projective transformation and not...
Dear Nikos, Francois and All My Friends, I observe some more interesting of Ka, Kb, Kc as following: 1. Four points Kb, Kc, B, C are concyclic on one circle....
Dear Quang and others, I have found this work very interesting. In it is a structure I thought I would never see. I am listing what is written in this long...
Dear Steve and All My Friends, Thank you for interesting and deep analyses and references for "my" Psi intersections. (By the way, please call me as Tuan...
Dear Francois, Quim, Bernard and other Hyacinthists I wrote ... In fact, there is an easier construction. H0 = rectangular circumhyperbola through P H1 =...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Hyacinthos group. File : /simson.pdf ...
Hyacinthos@yahoogroup...
Nov 5, 2006 12:56 pm
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Hey François, I'm not sure yet where I am going with this one. But, I'm thinking about filters. We know that first-order and/or second-order networks can be...
Hi, Jeff Good to have some news from you, even if I can't help you on filters. Now it was more than 55 years I have forgotten my Physics and I don't remember...
Hey François, Always nice to hear from you! The following is mainly just a reminder for myself. I still have a semester+ to go before I graduate (the second...
Dear All My Friends, Given triangle ABC with points A', B', C' on sidelines BC, CA, AB respectively. One line La passing through vertex A and parallel with...
Dear Hyacinthists, I am travelling on muddy water now. Browsing old messages (this is #4516) and Quim's site I am prompted to pose two questions: i) how can...
Dear Luis, ... if you take two in-conics with perspectors P, Q draw the trilinear polars of P, Q intersecting at X then the trilinear polar of X is the fourth...
What do you think of the new word 'proximal' which takes place of 'orthogonal projection' as the word 'trace' takes place of 'intersection?' The pedal triangle...
Deal all, Thanks Bernard for the answer. As for the other questions I saw in Quin's site what the definition of anticomplement is. So I need the G point. As a...
Dear friends As I am very happy about the last Jean-Pierre's construction of the 3 lines with given orthopole, I give you as a gift for the soon coming new...
Luis, The complement of a point is that point constructed in the medial triangle, whose vertices are the midpoints of the reference triangle ABC. The...
Dear Vijaya Prasad, Thank you very much for interesting proof especially we can see now that Q is isogonal conjugate of P wrt your center triangle MaMbMc. I am...
Dear Luis and Bernard, [LL]: How can one construct the common tangents to the incircle and MacBeath ellipse? This is Quim's c37.... [BG]: If you take two...
Dear friends, Thanks to Bui Quang Tuan for pointing out my silly mistakes in calculations. Here is a correction. Please accept my apology. [LL]: How can one...
Dear Tuan, Vijaya Prasad and all. The results as you mentioned in your configuration, is true in general case of a triangle A'B'C' and three arbitrary...
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