At: decls mng member 1 1 1 1
1. ds1: Collection(dec())
2. ds2: Collection(dec())
3. x: Label
4. rho: Decl
5. v:
d:{d:dec()| d
ds1 }. [[d]] rho(x)
6.
d:dec(). d
ds2 
d.lbl = x 
d
ds1
7. d: {d:dec()| d
ds2 }
8. d.lbl =
x
v
[[d]] rho(x)
By: AllHyps (IsectHD d)
Generated subgoal:1 | d = d {d:dec()| d ds1 } |
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