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theory Defs imports Main begin end
theory Submission
imports Defs
begin
lemma showmewhatyougot: "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
sorry
end
theory Check
imports Submission
begin
lemma "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
by (rule Submission.showmewhatyougot)
end
theory Defs imports Main begin end
theory Submission
imports Defs
begin
lemma showmewhatyougot: "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
sorry
end
theory Check
imports Submission
begin
lemma "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
by (rule Submission.showmewhatyougot)
end
theory Defs imports Main begin end
theory Submission
imports Defs
begin
lemma showmewhatyougot: "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
sorry
end
theory Check
imports Submission
begin
lemma "\<exists>f::(nat list \<Rightarrow> nat list). (\<forall> xs. (length xs \<ge> 2 \<longrightarrow> f xs \<noteq> xs))
\<and> (\<forall> xs. (f (f (f xs))) = xs)"
by (rule Submission.showmewhatyougot)
end