8 lines
211 B
Text
8 lines
211 B
Text
show a = c, from H1 ⬝ H2 : a = c
|
|
------------
|
|
have e1 : a = b, from H1,
|
|
have e2 : a = c, from e1 ⬝ H2,
|
|
have e3 : c = a, from e2⁻¹,
|
|
have e4 : b = a, from e1⁻¹,
|
|
show b = c, from e1⁻¹ ⬝ e2 :
|
|
b = c
|