diff --git a/_CoqProject b/_CoqProject
index b7a78865c..7a09f3f43 100644
--- a/_CoqProject
+++ b/_CoqProject
@@ -28,7 +28,7 @@ theories/topology.v
 theories/function_spaces.v
 theories/cantor.v
 theories/prodnormedzmodule.v
-theories/evt.v
+theories/tvs.v
 theories/normedtype.v
 theories/realfun.v
 theories/sequences.v
diff --git a/theories/Make b/theories/Make
index a0f868e85..5243f4661 100644
--- a/theories/Make
+++ b/theories/Make
@@ -16,7 +16,7 @@ topology.v
 function_spaces.v
 cantor.v
 prodnormedzmodule.v
-evt.v
+tvs.v
 normedtype.v
 realfun.v
 sequences.v
diff --git a/theories/normedtype.v b/theories/normedtype.v
index 1bebfc9ac..026b33158 100644
--- a/theories/normedtype.v
+++ b/theories/normedtype.v
@@ -6,7 +6,7 @@ From mathcomp Require Import boolp classical_sets functions.
 From mathcomp Require Import archimedean.
 From mathcomp Require Import cardinality set_interval Rstruct.
 Require Import ereal reals signed topology prodnormedzmodule function_spaces.
-Require Import evt.
+Require Import tvs.
 
 (**md**************************************************************************)
 (* # Norm-related Notions                                                     *)
@@ -791,6 +791,11 @@ HB.mixin Record PseudoMetricNormedZmod_Lmodule_isNormedModule K V
   normrZ : forall (l : K) (x : V), `| l *: x | = `| l | * `| x |;
 }.
 
+(*#[short(type="normedModType")]
+HB.structure Definition NormedModule (K : numDomainType) :=
+  {T of TopologicalLmodule K T & GRing.Lmodule K T
+   & PseudoMetricNormedZmod_Lmodule_isNormedModule K T}.*)
+
 #[short(type="normedModType")]
 HB.structure Definition NormedModule (K : numDomainType) :=
   {T of PseudoMetricNormedZmod K T & GRing.Lmodule K T
@@ -805,6 +810,22 @@ HB.instance Definition _ := NormedZmod_PseudoMetric_eq.Build R R^o erefl.
 HB.instance Definition _ :=
   PseudoMetricNormedZmod_Lmodule_isNormedModule.Build R R^o (@normrM _).
 
+(*Let Ro_add_continuous : continuous (uncurry (@GRing.add R^o)).
+Proof.
+Admitted.
+
+Let Ro_scale_continuous :
+  continuous (uncurry (@GRing.scale R R^o) : R^o * R^o -> R^o).
+Admitted.
+
+Let Ro_locally_convex : exists2 B : set (set R^o),
+  (forall b, b \in B -> convex b) & basis B.
+Admitted.
+
+HB.instance Definition _ :=
+  TopologicalLmod_isTvs.Build R R^o Ro_add_continuous
+    Ro_scale_continuous Ro_locally_convex.*)
+
 End regular_topology.
 
 Lemma ball_itv {R : realFieldType} (x r : R) :
diff --git a/theories/evt.v b/theories/tvs.v
similarity index 94%
rename from theories/evt.v
rename to theories/tvs.v
index 98c421438..f58bcb865 100644
--- a/theories/evt.v
+++ b/theories/tvs.v
@@ -18,8 +18,8 @@ Local Open Scope ring_scope.
 
 HB.structure Definition PointedNmodule := {M of Pointed M & GRing.Nmodule M}.
 HB.structure Definition PointedZmodule := {M of Pointed M & GRing.Zmodule M}.
-HB.structure Definition PointedLmodule (K : numDomainType) :=
-  {M of Pointed M & GRing.Lmodule K M}.
+HB.structure Definition PointedLmodule (K : numDomainType) := {M of Pointed M & GRing.Lmodule K M}.
+
 HB.structure Definition FilteredNmodule := {M of Filtered M M & GRing.Nmodule M}.
 HB.structure Definition FilteredZmodule := {M of Filtered M M & GRing.Zmodule M}.
 HB.structure Definition FilteredLmodule (K : numDomainType) :=
@@ -28,7 +28,8 @@ HB.structure Definition NbhsNmodule := {M of Nbhs M & GRing.Nmodule M}.
 HB.structure Definition NbhsZmodule := {M of Nbhs M & GRing.Zmodule M}.
 HB.structure Definition NbhsLmodule (K : numDomainType) :=
   {M of Nbhs M & GRing.Lmodule K M}.
-HB.structure Definition TopologicalNmodule := {M of Topological M & GRing.Nmodule M}.
+
+(*HB.structure Definition TopologicalNmodule := {M of Topological M & GRing.Nmodule M}.*)
 HB.structure Definition TopologicalZmodule :=
   {M of Topological M & GRing.Zmodule M}.
 HB.structure Definition TopologicalLmodule (K : numDomainType) :=
@@ -40,7 +41,7 @@ HB.structure Definition UniformLmodule (K : numDomainType) :=
 Definition convex (R : ringType) (M : lmodType R) (A : set M) :=
   forall x y lambda, lambda *: x + (1 - lambda) *: y \in A.
 
-HB.mixin Record Uniform_isEvt (R : numDomainType) E of Uniform E & GRing.Lmodule R E := {
+HB.mixin Record Uniform_isTvs (R : numDomainType) E of Uniform E & GRing.Lmodule R E := {
   add_continuous : continuous (fun x : E * E => x.1 + x.2) ;
     (*continuous (uncurry (@GRing.add E))*)
   scale_continuous : continuous (fun z : R^o * E => z.1 *: z.2) ;
@@ -49,17 +50,17 @@ HB.mixin Record Uniform_isEvt (R : numDomainType) E of Uniform E & GRing.Lmodule
 }.
 
 #[short(type="evtType")]
-HB.structure Definition Evt (R : numDomainType) :=
-  {E of Uniform_isEvt R E & Uniform E & GRing.Lmodule R E}.
+HB.structure Definition Tvs (R : numDomainType) :=
+  {E of Uniform_isTvs R E & Uniform E & GRing.Lmodule R E}.
 
-HB.factory Record TopologicalLmod_isEvt (R : numFieldType) E
+HB.factory Record TopologicalLmod_isTvs (R : numFieldType) E
     of Topological E & GRing.Lmodule R E := {
   add_continuous : continuous (uncurry (@GRing.add E));
   scale_continuous : continuous (uncurry (@GRing.scale R E) : R^o * E -> E);
   locally_convex : exists2 B : set (set E), (forall b, b \in B -> convex b) & basis B
 }.
 
-HB.builders Context R E of TopologicalLmod_isEvt R E.
+HB.builders Context R E of TopologicalLmod_isTvs R E.
 
 Definition entourage : set_system (E * E):=
   fun P => exists U, nbhs 0 U /\ (forall xy : E * E, (xy.1 - xy.2) \in U -> xy \in P).