diff --git a/rsconcept/frontend/src/components/Icons.tsx b/rsconcept/frontend/src/components/Icons.tsx
index 2db5ad7e..f475f25a 100644
--- a/rsconcept/frontend/src/components/Icons.tsx
+++ b/rsconcept/frontend/src/components/Icons.tsx
@@ -44,6 +44,8 @@ export { BiDownvote as IconMoveDown } from 'react-icons/bi';
 
 export { LuRotate3D as IconRotate3D } from 'react-icons/lu';
 export { MdOutlineFitScreen as IconFitImage } from 'react-icons/md';
+export { LuSparkles as IconClustering } from 'react-icons/lu';
+export { LuSparkle as IconClusteringOff } from 'react-icons/lu';
 
 interface IconSVGProps {
   viewBox: string;
diff --git a/rsconcept/frontend/src/components/info/InfoConstituenta.tsx b/rsconcept/frontend/src/components/info/InfoConstituenta.tsx
index 51615be9..f43c4fcd 100644
--- a/rsconcept/frontend/src/components/info/InfoConstituenta.tsx
+++ b/rsconcept/frontend/src/components/info/InfoConstituenta.tsx
@@ -13,6 +13,18 @@ function InfoConstituenta({ data, className, ...restProps }: InfoConstituentaPro
   return (
     <div className={clsx('dense', className)} {...restProps}>
       <h2>Конституента {data.alias}</h2>
+      {data.derived_alias ? (
+        <p>
+          <b>Основана на: </b>
+          {data.derived_alias}
+        </p>
+      ) : null}
+      {data.derived_children.length > 0 ? (
+        <p>
+          <b>Порождает: </b>
+          {data.derived_children.join(', ')}
+        </p>
+      ) : null}
       <p>
         <b>Типизация: </b>
         {labelCstTypification(data)}
diff --git a/rsconcept/frontend/src/dialogs/DlgGraphParams.tsx b/rsconcept/frontend/src/dialogs/DlgGraphParams.tsx
index 441a93d1..dde5357f 100644
--- a/rsconcept/frontend/src/dialogs/DlgGraphParams.tsx
+++ b/rsconcept/frontend/src/dialogs/DlgGraphParams.tsx
@@ -55,6 +55,12 @@ function DlgGraphParams({ hideWindow, initial, onConfirm }: DlgGraphParamsProps)
           value={params.noTransitive}
           setValue={value => updateParams({ noTransitive: value })}
         />
+        <Checkbox
+          label='Свернуть производные'
+          title='Отображать производные понятия вместе с основным'
+          value={params.foldDerived}
+          setValue={value => updateParams({ foldDerived: value })}
+        />
       </div>
       <div className='flex flex-col gap-1'>
         <h1 className='mb-2'>Типы конституент</h1>
diff --git a/rsconcept/frontend/src/models/Graph.ts b/rsconcept/frontend/src/models/Graph.ts
index 277a016e..f65930c2 100644
--- a/rsconcept/frontend/src/models/Graph.ts
+++ b/rsconcept/frontend/src/models/Graph.ts
@@ -69,6 +69,10 @@ export class Graph {
     return result;
   }
 
+  at(target: number): GraphNode | undefined {
+    return this.nodes.get(target);
+  }
+
   addNode(target: number): GraphNode {
     let node = this.nodes.get(target);
     if (!node) {
diff --git a/rsconcept/frontend/src/models/miscellaneous.ts b/rsconcept/frontend/src/models/miscellaneous.ts
index 20896b7b..d29c00c8 100644
--- a/rsconcept/frontend/src/models/miscellaneous.ts
+++ b/rsconcept/frontend/src/models/miscellaneous.ts
@@ -96,6 +96,7 @@ export interface GraphFilterParams {
   noTransitive: boolean;
   noTemplates: boolean;
   noText: boolean;
+  foldDerived: boolean;
 
   allowBase: boolean;
   allowStruct: boolean;
diff --git a/rsconcept/frontend/src/models/rsform.ts b/rsconcept/frontend/src/models/rsform.ts
index 0b03e95b..08924ea7 100644
--- a/rsconcept/frontend/src/models/rsform.ts
+++ b/rsconcept/frontend/src/models/rsform.ts
@@ -96,6 +96,9 @@ export interface IConstituenta extends IConstituentaMeta {
   cst_class: CstClass;
   status: ExpressionStatus;
   is_template: boolean;
+  derived_from: ConstituentaID;
+  derived_alias?: string;
+  derived_children: string[];
   parse: {
     status: ParsingStatus;
     valueClass: ValueClass;
diff --git a/rsconcept/frontend/src/models/rsformAPI.ts b/rsconcept/frontend/src/models/rsformAPI.ts
index b94ac972..807352b4 100644
--- a/rsconcept/frontend/src/models/rsformAPI.ts
+++ b/rsconcept/frontend/src/models/rsformAPI.ts
@@ -18,7 +18,7 @@ import {
   IRSFormStats
 } from './rsform';
 import { ParsingStatus, ValueClass } from './rslang';
-import { extractGlobals } from './rslangAPI';
+import { extractGlobals, isSimpleExpression, splitTemplateDefinition } from './rslangAPI';
 
 /**
  * Loads data into an {@link IRSForm} based on {@link IRSFormData}.
@@ -32,7 +32,11 @@ export function loadRSFormData(input: IRSFormData): IRSForm {
   result.graph = new Graph();
   result.stats = calculateStats(result.items);
 
+  const derivationLookup: Map<ConstituentaID, ConstituentaID> = new Map();
   result.items.forEach(cst => {
+    derivationLookup.set(cst.id, cst.id);
+    cst.derived_from = cst.id;
+    cst.derived_children = [];
     cst.status = inferStatus(cst.parse.status, cst.parse.valueClass);
     cst.is_template = inferTemplate(cst.definition_formal);
     cst.cst_class = inferClass(cst.cst_type, cst.is_template);
@@ -45,6 +49,34 @@ export function loadRSFormData(input: IRSFormData): IRSForm {
       }
     });
   });
+  // Calculate derivation of constituents based on formal definition analysis
+  result.graph.topologicalOrder().forEach(id => {
+    const cst = result.items.find(item => item.id === id)!;
+    const resolvedInput: Set<ConstituentaID> = new Set();
+    let definition = '';
+    if (!isFunctional(cst.cst_type)) {
+      const node = result.graph.at(id)!;
+      node.inputs.forEach(id => resolvedInput.add(derivationLookup.get(id)!));
+      definition = cst.definition_formal;
+    } else {
+      const expression = splitTemplateDefinition(cst.definition_formal);
+      definition = expression.body;
+      const dependencies = extractGlobals(definition);
+      dependencies.forEach(alias => {
+        const targetCst = result.items.find(item => item.alias === alias);
+        if (targetCst) {
+          resolvedInput.add(derivationLookup.get(targetCst.id)!);
+        }
+      });
+    }
+    if (resolvedInput.size === 1 && isSimpleExpression(definition)) {
+      const parent = result.items.find(item => item.id === resolvedInput.values().next().value)!;
+      cst.derived_from = parent.id;
+      cst.derived_alias = parent.alias;
+      parent.derived_children.push(cst.alias);
+      derivationLookup.set(cst.id, parent.id);
+    }
+  });
   return result;
 }
 
@@ -174,6 +206,8 @@ export function inferClass(type: CstType, isTemplate: boolean): CstClass {
 export function createMockConstituenta(id: ConstituentaID, alias: string, comment: string): IConstituenta {
   return {
     id: id,
+    derived_from: id,
+    derived_children: [],
     order: -1,
     schema: -1,
     alias: alias,
diff --git a/rsconcept/frontend/src/models/rslangAPI.test.ts b/rsconcept/frontend/src/models/rslangAPI.test.ts
index a7bbe0c3..32d61f1b 100644
--- a/rsconcept/frontend/src/models/rslangAPI.test.ts
+++ b/rsconcept/frontend/src/models/rslangAPI.test.ts
@@ -1,4 +1,4 @@
-import { extractGlobals, splitTemplateDefinition } from './rslangAPI';
+import { extractGlobals, isSimpleExpression, splitTemplateDefinition } from './rslangAPI';
 
 const globalsData = [
   ['', ''],
@@ -13,6 +13,23 @@ describe('Testing extract globals', () => {
   });
 });
 
+const simpleExpressionData = [
+  ['', 'true'],
+  ['Pr1(S1)', 'true'],
+  ['pr1(S1)', 'true'],
+  ['red(S1)', 'true'],
+  ['red(Pr1(F1[α,σ]))', 'true'],
+  ['D{(α,β)∈D6×D6 | α≠β & α∩β≠∅}', 'false'],
+  ['I{(β,α) | α:∈D2; σ:=F5[α]; β:∈σ}', 'false'],
+  ['∀σ∈S1 (F1[σ]×F1[σ])∩D11=∅', 'false']
+];
+describe('Testing simple expression', () => {
+  it.each(simpleExpressionData)('isSimpleExpression %p', (input: string, expected: string) => {
+    const result = isSimpleExpression(input);
+    expect(String(result)).toBe(expected);
+  });
+});
+
 const splitData = [
   ['', '||'],
   ['[α∈ℬ(R1)] α⊆red(σ)', 'α∈ℬ(R1)||α⊆red(σ)'],
diff --git a/rsconcept/frontend/src/models/rslangAPI.ts b/rsconcept/frontend/src/models/rslangAPI.ts
index 972adaf1..2cadb795 100644
--- a/rsconcept/frontend/src/models/rslangAPI.ts
+++ b/rsconcept/frontend/src/models/rslangAPI.ts
@@ -7,14 +7,24 @@ import { applyPattern } from '@/utils/utils';
 import { CstType } from './rsform';
 import { IArgumentValue, IRSErrorDescription, RSErrorClass, RSErrorType } from './rslang';
 
+// cspell:disable
 const LOCALS_REGEXP = /[_a-zα-ω][a-zα-ω]*\d*/g;
+const GLOBALS_REGEXP = /[XCSADFPT]\d+/g;
+const COMPLEX_SYMBOLS_REGEXP = /[∀∃×ℬ;|:]/g;
+// cspell:enable
 
 /**
  * Extracts global variable names from a given expression.
  */
 export function extractGlobals(expression: string): Set<string> {
-  // cspell:disable-next-line
-  return new Set(expression.match(/[XCSADFPT]\d+/g) ?? []);
+  return new Set(expression.match(GLOBALS_REGEXP) ?? []);
+}
+
+/**
+ * Check if expression is simple derivation.
+ */
+export function isSimpleExpression(text: string): boolean {
+  return !COMPLEX_SYMBOLS_REGEXP.test(text);
 }
 
 /**
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/EditorTermGraph.tsx b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/EditorTermGraph.tsx
index f6e745b9..74227e11 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/EditorTermGraph.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/EditorTermGraph.tsx
@@ -36,6 +36,7 @@ function EditorTermGraph({ onOpenEdit }: EditorTermGraphProps) {
     noTemplates: false,
     noTransitive: true,
     noText: false,
+    foldDerived: false,
 
     allowBase: true,
     allowStruct: true,
@@ -217,11 +218,18 @@ function EditorTermGraph({ onOpenEdit }: EditorTermGraphProps) {
         is3D={is3D}
         orbit={orbit}
         noText={filterParams.noText}
+        foldDerived={filterParams.foldDerived}
         showParamsDialog={() => setShowParamsDialog(true)}
         onCreate={handleCreateCst}
         onDelete={handleDeleteCst}
         onResetViewpoint={() => setToggleResetView(prev => !prev)}
         toggleOrbit={() => setOrbit(prev => !prev)}
+        toggleFoldDerived={() =>
+          setFilterParams(prev => ({
+            ...prev,
+            foldDerived: !prev.foldDerived
+          }))
+        }
         toggleNoText={() =>
           setFilterParams(prev => ({
             ...prev,
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/GraphToolbar.tsx b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/GraphToolbar.tsx
index f285a938..886e5829 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/GraphToolbar.tsx
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/GraphToolbar.tsx
@@ -1,6 +1,8 @@
 'use client';
 
 import {
+  IconClustering,
+  IconClusteringOff,
   IconDestroy,
   IconFilter,
   IconFitImage,
@@ -22,12 +24,14 @@ interface GraphToolbarProps {
 
   orbit: boolean;
   noText: boolean;
+  foldDerived: boolean;
 
   showParamsDialog: () => void;
   onCreate: () => void;
   onDelete: () => void;
   onResetViewpoint: () => void;
 
+  toggleFoldDerived: () => void;
   toggleNoText: () => void;
   toggleOrbit: () => void;
 }
@@ -35,7 +39,9 @@ interface GraphToolbarProps {
 function GraphToolbar({
   is3D,
   noText,
+  foldDerived,
   toggleNoText,
+  toggleFoldDerived,
   orbit,
   toggleOrbit,
   showParamsDialog,
@@ -67,6 +73,17 @@ function GraphToolbar({
           }
           onClick={toggleNoText}
         />
+        <MiniButton
+          title={!foldDerived ? 'Скрыть производные' : 'Отображать производные'}
+          icon={
+            !foldDerived ? (
+              <IconClustering size='1.25rem' className='icon-green' />
+            ) : (
+              <IconClusteringOff size='1.25rem' className='icon-primary' />
+            )
+          }
+          onClick={toggleFoldDerived}
+        />
         <MiniButton
           icon={<IconFitImage size='1.25rem' className='icon-primary' />}
           title='Граф целиком'
diff --git a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/useGraphFilter.ts b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/useGraphFilter.ts
index 797d4aef..1be288fe 100644
--- a/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/useGraphFilter.ts
+++ b/rsconcept/frontend/src/pages/RSFormPage/EditorTermGraph/useGraphFilter.ts
@@ -46,6 +46,13 @@ function useGraphFilter(schema: IRSForm | undefined, params: GraphFilterParams)
         }
       });
     }
+    if (params.foldDerived) {
+      schema.items.forEach(cst => {
+        if (cst.derived_alias) {
+          graph.foldNode(cst.id);
+        }
+      });
+    }
     setFiltered(graph);
   }, [schema, params, allowedTypes]);
 
diff --git a/rsconcept/frontend/src/utils/constants.ts b/rsconcept/frontend/src/utils/constants.ts
index 38c91603..82eab432 100644
--- a/rsconcept/frontend/src/utils/constants.ts
+++ b/rsconcept/frontend/src/utils/constants.ts
@@ -92,7 +92,7 @@ export const storage = {
   librarySearchStrategy: 'library.search.strategy',
   libraryPagination: 'library.pagination',
 
-  rsgraphFilter: 'rsgraph.filter',
+  rsgraphFilter: 'rsgraph.filter_options',
   rsgraphLayout: 'rsgraph.layout',
   rsgraphColoringScheme: 'rsgraph.coloring_scheme',