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17 include "datatypes_defs/Sequent.ma".
19 theorem linj_inj: \forall a,c. linj a = linj c \to a = c.
20 intros; whd in H:(? ? % %); destruct; autobatch.
23 theorem rinj_inj: \forall b,d. rinj b = rinj d \to b = d.
24 intros; whd in H:(? ? % %); destruct; autobatch.