Theorem b10 ≪ | index | src | ≫ 

theorem b10: $ b1 0 = 1 $;
StepHypRefExpression
1 suceq 
b0 0 = 0 -> suc (b0 0) = suc 0
2 1 conv b1, d1 
b0 0 = 0 -> b1 0 = 1
3 b00 
b0 0 = 0
4 2, 3 ax_mp 
b1 0 = 1

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp), axs_peano (peano2, add0)