diff --git a/src/core/include/mp-units/framework/quantity_cast.h b/src/core/include/mp-units/framework/quantity_cast.h
index 64d0154b..53b14815 100644
--- a/src/core/include/mp-units/framework/quantity_cast.h
+++ b/src/core/include/mp-units/framework/quantity_cast.h
@@ -53,10 +53,11 @@ namespace mp_units {
  * @tparam ToQS a quantity specification to use for a target quantity
  */
 template<QuantitySpec auto ToQS, typename Q>
-  requires Quantity<std::remove_cvref_t<Q>> && (castable(Q::quantity_spec, ToQS))
+  requires Quantity<std::remove_cvref_t<Q>> && (castable(std::remove_reference_t<Q>::quantity_spec, ToQS))
 [[nodiscard]] constexpr Quantity auto quantity_cast(Q&& q)
 {
-  return quantity{std::forward<Q>(q).numerical_value_is_an_implementation_detail_, make_reference(ToQS, Q::unit)};
+  return quantity{std::forward<Q>(q).numerical_value_is_an_implementation_detail_,
+                  make_reference(ToQS, std::remove_reference_t<Q>::unit)};
 }
 
 /**
@@ -77,11 +78,11 @@ template<QuantitySpec auto ToQS, typename Q>
  * @tparam ToQS a quantity specification to use for a target quantity point
  */
 template<QuantitySpec auto ToQS, typename QP>
-  requires QuantityPoint<std::remove_cvref_t<QP>> && (castable(QP::quantity_spec, ToQS))
+  requires QuantityPoint<std::remove_cvref_t<QP>> && (castable(std::remove_reference_t<QP>::quantity_spec, ToQS))
 [[nodiscard]] constexpr QuantityPoint auto quantity_cast(QP&& qp)
 {
   return QP{quantity_cast<ToQS>(std::forward<QP>(qp).quantity_from_origin_is_an_implementation_detail_),
-            qp.point_origin};
+            std::remove_reference_t<QP>::point_origin};
 }
 
 }  // namespace mp_units
diff --git a/src/core/include/mp-units/framework/value_cast.h b/src/core/include/mp-units/framework/value_cast.h
index eaedbd17..1f92bcea 100644
--- a/src/core/include/mp-units/framework/value_cast.h
+++ b/src/core/include/mp-units/framework/value_cast.h
@@ -107,7 +107,7 @@ template<Unit auto ToU, typename QP>
 [[nodiscard]] constexpr QuantityPoint auto value_cast(QP&& qp)
 {
   return quantity_point{value_cast<ToU>(std::forward<QP>(qp).quantity_from_origin_is_an_implementation_detail_),
-                        qp.point_origin};
+                        std::remove_reference_t<QP>::point_origin};
 }
 
 /**
@@ -124,10 +124,12 @@ template<Representation ToRep, typename QP>
   requires QuantityPoint<std::remove_cvref_t<QP>> &&
            RepresentationOf<ToRep, std::remove_reference_t<QP>::quantity_spec.character> &&
            std::constructible_from<ToRep, typename std::remove_reference_t<QP>::rep>
-[[nodiscard]] constexpr quantity_point<std::remove_reference_t<QP>::reference, QP::point_origin, ToRep> value_cast(
-  QP&& qp)
+[[nodiscard]] constexpr quantity_point<std::remove_reference_t<QP>::reference,
+                                       std::remove_reference_t<QP>::point_origin, ToRep>
+value_cast(QP&& qp)
 {
-  return {value_cast<ToRep>(std::forward<QP>(qp).quantity_from_origin_is_an_implementation_detail_), qp.point_origin};
+  return {value_cast<ToRep>(std::forward<QP>(qp).quantity_from_origin_is_an_implementation_detail_),
+          std::remove_reference_t<QP>::point_origin};
 }
 
 /**
@@ -147,7 +149,7 @@ template<Unit auto ToU, Representation ToRep, typename QP>
 [[nodiscard]] constexpr QuantityPoint auto value_cast(QP&& qp)
 {
   return quantity_point{value_cast<ToU, ToRep>(std::forward<QP>(qp).quantity_from_origin_is_an_implementation_detail_),
-                        qp.point_origin};
+                        std::remove_reference_t<QP>::point_origin};
 }
 
 }  // namespace mp_units
diff --git a/src/core/include/mp-units/math.h b/src/core/include/mp-units/math.h
index 90a6539a..e6957201 100644
--- a/src/core/include/mp-units/math.h
+++ b/src/core/include/mp-units/math.h
@@ -25,6 +25,7 @@
 #include <mp-units/bits/module_macros.h>
 #include <mp-units/framework/customization_points.h>
 #include <mp-units/framework/quantity.h>
+#include <mp-units/framework/quantity_point.h>
 #include <mp-units/framework/unit.h>
 #include <mp-units/framework/value_cast.h>
 
@@ -130,10 +131,10 @@ template<auto R, typename Rep>
 }
 
 /**
- * @brief Determines if a number is finite.
+ * @brief Determines if a quantity is finite.
  *
- * @param a: Number to analyze.
- * @return bool: Whether the number is finite or not.
+ * @param a: Quantity to analyze.
+ * @return bool: Whether the quantity is finite or not.
  */
 template<auto R, typename Rep>
   requires requires(Rep v) { isfinite(v); } || requires(Rep v) { std::isfinite(v); }
@@ -144,10 +145,23 @@ template<auto R, typename Rep>
 }
 
 /**
- * @brief Determines if a number is infinite.
+ * @brief Determines if a quantity point is finite.
  *
- * @param a: Number to analyze.
- * @return bool: Whether the number is infinite or not.
+ * @param a: Quantity point to analyze.
+ * @return bool: Whether the quantity point is finite or not.
+ */
+template<auto R, auto PO, typename Rep>
+  requires requires(quantity<R, Rep> q) { isfinite(q); }
+[[nodiscard]] constexpr bool isfinite(const quantity_point<R, PO, Rep>& a) noexcept
+{
+  return isfinite(a.quantity_ref_from(a.point_origin));
+}
+
+/**
+ * @brief Determines if a quantity is infinite.
+ *
+ * @param a: Quantity to analyze.
+ * @return bool: Whether the quantity is infinite or not.
  */
 template<auto R, typename Rep>
   requires requires(Rep v) { isinf(v); } || requires(Rep v) { std::isinf(v); }
@@ -157,12 +171,25 @@ template<auto R, typename Rep>
   return isinf(a.numerical_value_ref_in(a.unit));
 }
 
+/**
+ * @brief Determines if a quantity point is infinite.
+ *
+ * @param a: Quantity point to analyze.
+ * @return bool: Whether the quantity point is infinite or not.
+ */
+template<auto R, auto PO, typename Rep>
+  requires requires(quantity<R, Rep> q) { isinf(q); }
+[[nodiscard]] constexpr bool isinf(const quantity_point<R, PO, Rep>& a) noexcept
+{
+  return isinf(a.quantity_ref_from(a.point_origin));
+}
+
 
 /**
- * @brief Determines if a number is a nan.
+ * @brief Determines if a quantity is a nan.
  *
- * @param a: Number to analyze.
- * @return bool: Whether the number is a NaN or not.
+ * @param a: Quantity to analyze.
+ * @return bool: Whether the quantity is a NaN or not.
  */
 template<auto R, typename Rep>
   requires requires(Rep v) { isnan(v); } || requires(Rep v) { std::isnan(v); }
@@ -172,6 +199,20 @@ template<auto R, typename Rep>
   return isnan(a.numerical_value_ref_in(a.unit));
 }
 
+
+/**
+ * @brief Determines if a quantity point is a nan.
+ *
+ * @param a: Quantity point to analyze.
+ * @return bool: Whether the quantity point is a NaN or not.
+ */
+template<auto R, auto PO, typename Rep>
+  requires requires(quantity<R, Rep> q) { isnan(q); }
+[[nodiscard]] constexpr bool isnan(const quantity_point<R, PO, Rep>& a) noexcept
+{
+  return isnan(a.quantity_ref_from(a.point_origin));
+}
+
 /**
  * @brief Computes the fma of 3 quantities
  *
diff --git a/src/systems/include/mp-units/systems/si/unit_symbols.h b/src/systems/include/mp-units/systems/si/unit_symbols.h
index 8477bbb2..060bfb93 100644
--- a/src/systems/include/mp-units/systems/si/unit_symbols.h
+++ b/src/systems/include/mp-units/systems/si/unit_symbols.h
@@ -474,6 +474,32 @@ inline constexpr auto YF = yotta<farad>;
 inline constexpr auto RF = ronna<farad>;
 inline constexpr auto QF = quetta<farad>;
 
+inline constexpr auto qohm = quecto<si::ohm>;
+inline constexpr auto rohm = ronto<si::ohm>;
+inline constexpr auto yohm = yocto<si::ohm>;
+inline constexpr auto zohm = zepto<si::ohm>;
+inline constexpr auto aohm = atto<si::ohm>;
+inline constexpr auto fohm = femto<si::ohm>;
+inline constexpr auto pohm = pico<si::ohm>;
+inline constexpr auto nohm = nano<si::ohm>;
+inline constexpr auto uohm = micro<si::ohm>;
+inline constexpr auto mohm = milli<si::ohm>;
+inline constexpr auto cohm = centi<si::ohm>;
+inline constexpr auto dohm = deci<si::ohm>;
+using si::ohm;
+inline constexpr auto daohm = deca<si::ohm>;
+inline constexpr auto hohm = hecto<si::ohm>;
+inline constexpr auto kohm = kilo<si::ohm>;
+inline constexpr auto Mohm = mega<si::ohm>;
+inline constexpr auto Gohm = giga<si::ohm>;
+inline constexpr auto Tohm = tera<si::ohm>;
+inline constexpr auto Pohm = peta<si::ohm>;
+inline constexpr auto Eohm = exa<si::ohm>;
+inline constexpr auto Zohm = zetta<si::ohm>;
+inline constexpr auto Yohm = yotta<si::ohm>;
+inline constexpr auto Rohm = ronna<si::ohm>;
+inline constexpr auto Qohm = quetta<si::ohm>;
+
 inline constexpr auto qS = quecto<siemens>;
 inline constexpr auto rS = ronto<siemens>;
 inline constexpr auto yS = yocto<siemens>;
diff --git a/test/static/quantity_point_test.cpp b/test/static/quantity_point_test.cpp
index 27016618..acc53416 100644
--- a/test/static/quantity_point_test.cpp
+++ b/test/static/quantity_point_test.cpp
@@ -1677,4 +1677,19 @@ static_assert(invalid_addition(5 * isq::activity[Bq], 10 / (2 * isq::time[s]), q
 static_assert(invalid_subtraction(quantity_point{5 * isq::activity[Bq]}, 10 / (2 * isq::time[s]),
                                   5 * isq::frequency[Hz]));
 
+// value_cast
+
+static_assert(value_cast<m>(quantity_point{2 * km}).quantity_from_zero().numerical_value_in(m) == 2000);
+static_assert(value_cast<km>(quantity_point{2000 * m}).quantity_from_zero().numerical_value_in(km) == 2);
+static_assert(value_cast<int>(quantity_point{1.23 * m}).quantity_from_zero().numerical_value_in(m) == 1);
+static_assert(
+  value_cast<km / h>(quantity_point{2000.0 * m / (3600.0 * s)}).quantity_from_zero().numerical_value_in(km / h) == 2);
+// lvalue references in value_cast
+namespace lvalue_tests {
+constexpr quantity_point lvalue_qp{2 * km};
+static_assert(value_cast<m>(lvalue_qp).quantity_from_zero().numerical_value_in(m) == 2000);
+static_assert(value_cast<float>(lvalue_qp).quantity_from_zero().numerical_value_in(km) == 2.f);
+static_assert(value_cast<m, float>(lvalue_qp).quantity_from_zero().numerical_value_in(m) == 2000.f);
+}  // namespace lvalue_tests
+
 }  // namespace
diff --git a/test/static/quantity_test.cpp b/test/static/quantity_test.cpp
index 4931ce74..69b653f7 100644
--- a/test/static/quantity_test.cpp
+++ b/test/static/quantity_test.cpp
@@ -937,7 +937,11 @@ static_assert(is_of_type<quantity_cast<isq::distance>(1 * m), quantity<isq::dist
 static_assert(is_of_type<quantity_cast<isq::distance>(isq::length(1 * m)), quantity<isq::distance[m], int>>);
 static_assert(is_of_type<quantity_cast<kind_of<isq::length>>(isq::length(1 * m)), quantity<si::metre, int>>);
 static_assert(is_of_type<quantity_cast<kind_of<isq::length>>(isq::distance(1 * m)), quantity<si::metre, int>>);
-
+// lvalue references in quantity_cast
+namespace lvalue_tests {
+constexpr quantity<m, int> lvalue_q = 1 * m;
+static_assert(is_of_type<quantity_cast<isq::distance>(lvalue_q), quantity<isq::distance[m], int>>);
+}  // namespace lvalue_tests
 
 // QuantityOf
 static_assert(QuantityOf<quantity<isq::length[m]>, isq::length>);