nat/primes.ma logic/connectives.ma nat/div_and_mod.ma nat/factorial.ma nat/minimization.ma nat/sigma_and_pi.ma
nat/gcd_properties1.ma nat/gcd.ma
list/sort.ma datatypes/bool.ma datatypes/constructors.ma list/in.ma
+didactic/exercises/natural_deduction.ma didactic/support/natural_deduction.ma
Z/times.ma Z/plus.ma nat/lt_arith.ma
Z/sigma_p.ma Z/plus.ma Z/times.ma nat/generic_iter_p.ma nat/ord.ma nat/primes.ma
nat/o.ma nat/binomial.ma nat/sqrt.ma