diff --git a/kmath-ast/src/jvmMain/kotlin/scientifik/kmath/asm/internal/AsmBuilder.kt b/kmath-ast/src/jvmMain/kotlin/scientifik/kmath/asm/internal/AsmBuilder.kt
index a947b3478..f8c159baf 100644
--- a/kmath-ast/src/jvmMain/kotlin/scientifik/kmath/asm/internal/AsmBuilder.kt
+++ b/kmath-ast/src/jvmMain/kotlin/scientifik/kmath/asm/internal/AsmBuilder.kt
@@ -340,7 +340,7 @@ internal class AsmBuilder<T> internal constructor(
         checkcast(type)
     }
 
-    fun loadNumeric(value: Number) {
+    internal fun loadNumeric(value: Number) {
         if (expectationStack.peek() == NUMBER_TYPE) {
             loadNumberConstant(value, true)
             expectationStack.pop()
diff --git a/kmath-core/src/jvmMain/kotlin/scientifik/kmath/operations/BigNumbers.kt b/kmath-core/src/jvmMain/kotlin/scientifik/kmath/operations/BigNumbers.kt
index e6f09c040..eb268bb5e 100644
--- a/kmath-core/src/jvmMain/kotlin/scientifik/kmath/operations/BigNumbers.kt
+++ b/kmath-core/src/jvmMain/kotlin/scientifik/kmath/operations/BigNumbers.kt
@@ -8,30 +8,48 @@ import java.math.MathContext
  * A field wrapper for Java [BigInteger]
  */
 object JBigIntegerField : Field<BigInteger> {
-    override val zero: BigInteger = BigInteger.ZERO
-    override val one: BigInteger = BigInteger.ONE
+    override val zero: BigInteger
+        get() = BigInteger.ZERO
 
-    override fun add(a: BigInteger, b: BigInteger): BigInteger = a.add(b)
-
-    override fun multiply(a: BigInteger, k: Number): BigInteger = a.multiply(k.toInt().toBigInteger())
-
-    override fun multiply(a: BigInteger, b: BigInteger): BigInteger = a.multiply(b)
+    override val one: BigInteger
+        get() = BigInteger.ONE
 
+    override fun number(value: Number): BigInteger = BigInteger.valueOf(value.toLong())
     override fun divide(a: BigInteger, b: BigInteger): BigInteger = a.div(b)
+    override fun add(a: BigInteger, b: BigInteger): BigInteger = a.add(b)
+    override fun BigInteger.minus(b: BigInteger): BigInteger = this.subtract(b)
+    override fun multiply(a: BigInteger, k: Number): BigInteger = a.multiply(k.toInt().toBigInteger())
+    override fun multiply(a: BigInteger, b: BigInteger): BigInteger = a.multiply(b)
+    override fun BigInteger.unaryMinus(): BigInteger = negate()
 }
 
 /**
  * A Field wrapper for Java [BigDecimal]
  */
-class JBigDecimalField(val mathContext: MathContext = MathContext.DECIMAL64) : Field<BigDecimal> {
-    override val zero: BigDecimal = BigDecimal.ZERO
-    override val one: BigDecimal = BigDecimal.ONE
+abstract class JBigDecimalFieldBase internal constructor(val mathContext: MathContext = MathContext.DECIMAL64) :
+    Field<BigDecimal>,
+    PowerOperations<BigDecimal> {
+    override val zero: BigDecimal
+        get() = BigDecimal.ZERO
+
+    override val one: BigDecimal
+        get() = BigDecimal.ONE
 
     override fun add(a: BigDecimal, b: BigDecimal): BigDecimal = a.add(b)
+    override fun BigDecimal.minus(b: BigDecimal): BigDecimal = subtract(b)
+    override fun number(value: Number): BigDecimal = BigDecimal.valueOf(value.toDouble())
 
     override fun multiply(a: BigDecimal, k: Number): BigDecimal =
         a.multiply(k.toDouble().toBigDecimal(mathContext), mathContext)
 
     override fun multiply(a: BigDecimal, b: BigDecimal): BigDecimal = a.multiply(b, mathContext)
     override fun divide(a: BigDecimal, b: BigDecimal): BigDecimal = a.divide(b, mathContext)
-}
\ No newline at end of file
+    override fun power(arg: BigDecimal, pow: Number): BigDecimal = arg.pow(pow.toInt(), mathContext)
+    override fun sqrt(arg: BigDecimal): BigDecimal = arg.sqrt(mathContext)
+    override fun BigDecimal.unaryMinus(): BigDecimal = negate(mathContext)
+
+}
+
+class JBigDecimalField(mathContext: MathContext = MathContext.DECIMAL64) : JBigDecimalFieldBase(mathContext) {
+    companion object : JBigDecimalFieldBase()
+}