|WikiProject Physics||(Rated Start-class, High-importance)|
Where is the math?
The usual in physics is to model things mathematically. If strings are not themselves mathematical objects, presumably they are modeled by mathematical objects. I would expect some mathematical definitions. Thanks if you can help.CountMacula (talk) 19:52, 22 August 2014 (UTC)
Modes of open strings?
In the final sentence of Closed and open strings:
(...) In certain string theories the lowest-energy vibration of an open string is a tachyon and can undergo tachyon condensation. Other vibrational modes of open strings exhibit the properties of photons and gluons.