fourier theoremfourier transformfourthfourth degreefourth degree polynomialfourth proportionalfourth quadrantfractilefractionfraction defectivesfraction in lowest termsfraction linefraction numberfractionalfractional cutfractional distillationfractional equationfractional exponentfractional idealfractional linearfractional linear transformationfractional partfractional powerfracturefracture stressfragmentfragmentationframeframe fieldframe of referenceframe of samplingframedframed submanifoldfranchisefrechet derivativefrechet distancefrechet l spacefrechet spacefredholm determinantfredholm integral equationsfredholm methodfredholm operatorfreefree abelian groupfree alongside shipfree body diagramfree boundaryfree distributionfree fitfree float