diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/CalculatePsychomatrixByDate.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/CalculatePsychomatrixByDateUseCase.kt
similarity index 100%
rename from src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/CalculatePsychomatrixByDate.kt
rename to src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/CalculatePsychomatrixByDateUseCase.kt
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/entities/MutablePsychomatrix.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/entities/MutablePsychomatrix.kt
index 6082149..d9fcee9 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/entities/MutablePsychomatrix.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/entities/MutablePsychomatrix.kt
@@ -1,12 +1,47 @@
 package com.github.insanusmokrassar.PsychomatrixBase.domain.entities
 
+import com.github.insanusmokrassar.PsychomatrixBase.domain.entities.operations.Operation
+import com.github.insanusmokrassar.PsychomatrixBase.domain.entities.operations.availableConverts
+import com.github.insanusmokrassar.PsychomatrixBase.domain.entities.operations.availableInverts
+import kotlinx.coroutines.experimental.Deferred
+import kotlinx.coroutines.experimental.async
 import org.joda.time.DateTime
 
 class MutablePsychomatrix(date: DateTime) : Psychomatrix(date) {
-    private var mutableNumbers = super.numbers
+    private var mutableNumbers = super.numbers.toMutableList()
 
     override val numbers: ByteArray
-        get() = mutableNumbers
+        get() = mutableNumbers.toByteArray()
 
+    private val mutableOperationsHistory: MutableList<Operation> = ArrayList()
 
+    val availableOperations: Deferred<List<Operation>>
+        get() = async {
+            availableConverts.await().plus(availableInverts.await())
+        }
+
+    private val availableConverts: Deferred<List<Operation>>
+        get() = async {
+            availableConverts(mutableNumbers, mutableOperationsHistory)
+        }
+    private val availableInverts: Deferred<List<Operation>>
+        get() = async {
+            availableInverts(mutableNumbers, mutableOperationsHistory)
+        }
+
+    suspend fun applyConvert(operation: Operation): Boolean {
+        if (operation in availableConverts.await()) {
+            operation.convert(mutableNumbers, mutableOperationsHistory)
+            return true
+        }
+        return false
+    }
+
+    suspend fun applyInvert(operation: Operation): Boolean {
+        if (operation in availableInverts.await()) {
+            operation.invert(mutableNumbers, mutableOperationsHistory)
+            return true
+        }
+        return false
+    }
 }
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/CalculatePsychomatrixByDateInteractor.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/CalculatePsychomatrixByDateUseCaseInteractor.kt
similarity index 100%
rename from src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/CalculatePsychomatrixByDateInteractor.kt
rename to src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/CalculatePsychomatrixByDateUseCaseInteractor.kt