Theorem: continuous_sInf_dom₂
File: Mathlib/Topology/Constructions.lean

Proof steps:
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type ?u.29140
Y : Type ?u.29144
Z : Type ?u.29153
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
⊢ Sort ?u.29318
state_after: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type ?u.29140
Y : Type ?u.29144
Z : Type ?u.29153
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
this : TopologicalSpace X
⊢ Sort ?u.29318
tactic: haveI := sInf tas
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type ?u.29140
Y : Type ?u.29144
Z : Type ?u.29153
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
this : TopologicalSpace X
⊢ Sort ?u.29318
state_after: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type ?u.29140
Y : Type ?u.29144
Z : Type ?u.29153
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
this✝ : TopologicalSpace X
this : TopologicalSpace Y
⊢ Sort ?u.29318
tactic: haveI := sInf tbs
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type ?u.29140
Y : Type ?u.29144
Z : Type ?u.29153
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
this✝ : TopologicalSpace X
this : TopologicalSpace Y
⊢ Sort ?u.29318
state_after: no goals
tactic: exact @Continuous _ _ _ tc fun p : X × Y => f p.1 p.2
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
⊢ Continuous fun p => f p.1 p.2
state_after: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
⊢ Continuous fun p => f p.1 p.2
tactic: have hX := continuous_sInf_dom hX continuous_id
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
⊢ Continuous fun p => f p.1 p.2
state_after: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY✝ : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
hY : Continuous id
⊢ Continuous fun p => f p.1 p.2
tactic: have hY := continuous_sInf_dom hY continuous_id
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY✝ : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
hY : Continuous id
⊢ Continuous fun p => f p.1 p.2
state_after: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY✝ : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
hY : Continuous id
h_continuous_id : Continuous fun p => (id p.1, id p.2)
⊢ Continuous fun p => f p.1 p.2
tactic: have h_continuous_id := @Continuous.prod_map _ _ _ _ tX tY (sInf tas) (sInf tbs) _ _ hX hY
state_before: X✝ : Type u
Y✝ : Type v
Z✝ : Type u_1
W : Type u_2
ε : Type u_3
ζ : Type u_4
inst✝⁵ : TopologicalSpace X✝
inst✝⁴ : TopologicalSpace Y✝
inst✝³ : TopologicalSpace Z✝
inst✝² : TopologicalSpace W
inst✝¹ : TopologicalSpace ε
inst✝ : TopologicalSpace ζ
X : Type u_5
Y : Type u_6
Z : Type u_7
f : X → Y → Z
tas : Set (TopologicalSpace X)
tbs : Set (TopologicalSpace Y)
tX : TopologicalSpace X
tY : TopologicalSpace Y
tc : TopologicalSpace Z
hX✝ : tX ∈ tas
hY✝ : tY ∈ tbs
hf : Continuous fun p => f p.1 p.2
hX : Continuous id
hY : Continuous id
h_continuous_id : Continuous fun p => (id p.1, id p.2)
⊢ Continuous fun p => f p.1 p.2
state_after: no goals
tactic: exact @Continuous.comp _ _ _ (id _) (id _) _ _ _ hf h_continuous_id