Added metric.v defining metric spaces; should replace Classified.v
git testing
Merge branch 'master' of github.com:EvgenyMakarov/corn
Changed UniformlyContinuous and Contraction into unbundled type classes. Bundling is expected to be done later, if necessary.
Proved a lemma for the fixpoint theorem about the distance between x_n and x_{n+1}
Proved a lemma needed to show that the sequence of approximations is a Cauchy sequence.
Proved lemma dist_xm_xn'
Defined complete metric spaces
Defined complete metric space
Proved theorems about limits and continuous functions, contractions
Proved Banach fixpoint theorem
Changed the definition of equality in a metric space and removed unnecessary axioms
Added FromMetric2.v to define conversion from metric2.Metric to the metric space type class
Proved that metric spaces in terms of CoRN.metric2.Metric are metric spaces in terms of type classes
Used CoRN.metric2.Metric.gball to shorten the conversion from CoRN metric space to type class version
Proved that the completion of a metric space in the sense of Metric2.Complete is complete in the sense of type classes
Started adapting Simpson integration to AR
Experiments on Simpson integration
Added Picard iteration
Moved Banach Fixpoint theorem into BanachFixpoint.v. Added locally uniformly continuous functions to metric.v