@@ -5,6 +5,8 @@ import { ArgumentsError } from './ArgumentsError'
 import { DimensionError } from './DimensionError'
 import { IndexError } from './IndexError'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   factory('error.ArgumentsError', [], () => ArgumentsError),
   factory('error.DimensionError', [], () => DimensionError),
 
@@ -7,6 +7,8 @@ import { createEvaluate } from './evaluate'
 import { createParser } from './parser'
 import { createDeprecatedEval } from './eval'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createCompile,
   createEvaluate,
 
@@ -8,6 +8,8 @@ import { createEmbeddedDocs } from './embeddedDocs'
 import { createHelpClass } from './Help'
 import { createParserClass } from './Parser'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   // Note that the docs folder is called "embeddedDocs" and not "docs" to prevent issues
   // with yarn autoclean. See https://github.com/josdejong/mathjs/issues/969
 
@@ -17,6 +17,8 @@ import { createRangeNode } from './RangeNode'
 import { createRelationalNode } from './RelationalNode'
 import { createSymbolNode } from './SymbolNode'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createAccessorNode,
   createArrayNode,
 
@@ -11,6 +11,8 @@ import { createMinTransform } from './min.transform'
 import { createRangeTransform } from './range.transform'
 import { createSubsetTransform } from './subset.transform'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createConcatTransform,
   createFilterTransform,
 
@@ -11,6 +11,8 @@ import { createLsolve } from './solver/lsolve'
 import { createUsolve } from './solver/usolve'
 import { createLusolve } from './solver/lusolve'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createDerivative,
 
 
@@ -38,6 +38,8 @@ import { createUnaryMinus } from './unaryMinus'
 import { createUnaryPlus } from './unaryPlus'
 import { createXgcd } from './xgcd'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createAbs,
   createAdd,
 
@@ -8,6 +8,8 @@ import { createLeftShift } from './leftShift'
 import { createRightArithShift } from './rightArithShift'
 import { createRightLogShift } from './rightLogShift'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createBitAnd,
   createBitNot,
 
@@ -5,6 +5,8 @@ import { createComposition } from './composition'
 import { createStirlingS2 } from './stirlingS2'
 import { createCatalan } from './catalan'
 
+console.log('This index file is deprecated since v6.0.0. Please use factory.js instead')
+
 export default [
   createBellNumbers,
   createComposition,