536 Fig. 1. Aeroponic A-frame unit opened to show Anemopsis californica (yerba mansa) roots (Native American Botanics Corp, Tucson, Ariz.). of the crop are suspended in a spray chamber where they are fully accessible for monitoring and harvesting, permitting multiple harvests of roots from a single crop (Fig. 1). The aeroponic systems were designed and constructed by Native American Botanics Co...

We give an algorithm for computing all roots of polynomials over a univariate power series ring over an exact €eld K. More precisely, given a precision d , and a polynomial Q whose coecients are power series in x , the algorithm computes a representation of all power series f (x) such that Q(f (x)) = 0 mod xd . Œe algorithm works unconditionally, in particular also with multiple roots, where N...