Talk:Foster's reactance theorem

Physics Start‑class Mid‑importance

	Physics portal This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics
Start	This article has been rated as Start-class on Wikipedia's content assessment scale.
Mid	This article has been rated as Mid-importance on the project's importance scale.

Electronics Start‑class

	Electronics portal This article is part of WikiProject Electronics, an attempt to provide a standard approach to writing articles about electronics on Wikipedia. If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks. Leave messages at the project talk pageElectronicsWikipedia:WikiProject ElectronicsTemplate:WikiProject Electronicselectronic
Start	This article has been rated as Start-class on Wikipedia's content assessment scale.
???	This article has not yet received a rating on the project's importance scale.

A fact from Foster's reactance theorem appeared on Wikipedia's Main Page in the Did you know column on 10 June 2010 (check views). The text of the entry was as follows:

Did you know... that Foster's reactance theorem ensures that plots on a Smith chart of an electrical network impedance function always travel around the chart in a clockwise direction with increasing frequency?

A record of the entry may be seen at Wikipedia:Recent additions/2010/June.

Wikipedia

Strange formulation

Odd that for the formulator of this theorem, a function such as x/(1-x^2) is considered to be increasing (for the range x>0). Won't this lead to difficulties in the application of the theorem to situations where values are being compared?