Fix naming for hypergeometric_1F0

Author: andrjohns

stan/math/fwd/fun/hypergeometric_1F0.hpp

@@ -31,10 +31,10 @@ namespace math {
 template <typename Ta, typename Tz, typename FvarT = return_type_t<Ta, Tz>,
           require_all_stan_scalar_t<Ta, Tz>* = nullptr,
           require_any_fvar_t<Ta, Tz>* = nullptr>
-FvarT hypergeometric_1f0(const Ta& a, const Tz& z) {
+FvarT hypergeometric_1F0(const Ta& a, const Tz& z) {
   partials_type_t<Ta> a_val = value_of(a);
   partials_type_t<Tz> z_val = value_of(z);
-  FvarT rtn = FvarT(hypergeometric_1f0(a_val, z_val), 0.0);
+  FvarT rtn = FvarT(hypergeometric_1F0(a_val, z_val), 0.0);
   if (!is_constant_all<Ta>::value) {
     rtn.d_ += forward_as<FvarT>(a).d() * -rtn.val() * log1m(z_val);
   }

stan/math/prim/fun/hypergeometric_1F0.hpp

@@ -28,9 +28,9 @@ namespace math {
  * @return Hypergeometric 1F0 function
  */
 template <typename Ta, typename Tz, require_all_arithmetic_t<Ta, Tz>* = nullptr>
-return_type_t<Ta, Tz> hypergeometric_1f0(const Ta& a, const Tz& z) {
-  constexpr const char* function = "hypergeometric_1f0";
-  check_less("hypergeometric_1f0", "abs(z)", std::fabs(z), 1.0);
+return_type_t<Ta, Tz> hypergeometric_1F0(const Ta& a, const Tz& z) {
+  constexpr const char* function = "hypergeometric_1F0";
+  check_less("hypergeometric_1F0", "abs(z)", std::fabs(z), 1.0);
 
   return boost::math::hypergeometric_1F0(a, z, boost_policy_t<>());
 }

stan/math/rev/fun/hypergeometric_1F0.hpp

@@ -31,10 +31,10 @@ namespace math {
 template <typename Ta, typename Tz,
           require_all_stan_scalar_t<Ta, Tz>* = nullptr,
           require_any_var_t<Ta, Tz>* = nullptr>
-var hypergeometric_1f0(const Ta& a, const Tz& z) {
+var hypergeometric_1F0(const Ta& a, const Tz& z) {
   double a_val = value_of(a);
   double z_val = value_of(z);
-  double rtn = hypergeometric_1f0(a_val, z_val);
+  double rtn = hypergeometric_1F0(a_val, z_val);
   return make_callback_var(rtn, [rtn, a, z, a_val, z_val](auto& vi) mutable {
     if (!is_constant_all<Ta>::value) {
       forward_as<var>(a).adj() += vi.adj() * -rtn * log1m(z_val);

test/unit/math/mix/fun/hypergeometric_1F0_test.cpp

@@ -1,9 +1,9 @@
 #include <test/unit/math/test_ad.hpp>
 
-TEST(mathMixScalFun, hypergeometric_1f0) {
+TEST(mathMixScalFun, hypergeometric_1F0) {
   auto f = [](const auto& x1, const auto& x2) {
-    using stan::math::hypergeometric_1f0;
-    return hypergeometric_1f0(x1, x2);
+    using stan::math::hypergeometric_1F0;
+    return hypergeometric_1F0(x1, x2);
   };
 
   stan::test::expect_ad(f, 5, 0.3);

test/unit/math/prim/fun/hypergeometric_1F0_test.cpp

@@ -3,21 +3,21 @@
 #include <cmath>
 #include <limits>
 
-TEST(MathFunctions, hypergeometric_1f0Double) {
-  using stan::math::hypergeometric_1f0;
+TEST(MathFunctions, hypergeometric_1F0Double) {
+  using stan::math::hypergeometric_1F0;
   using stan::math::inv;
 
-  EXPECT_FLOAT_EQ(4.62962962963, hypergeometric_1f0(3, 0.4));
-  EXPECT_FLOAT_EQ(0.510204081633, hypergeometric_1f0(2, -0.4));
-  EXPECT_FLOAT_EQ(300.906354890, hypergeometric_1f0(16.0, 0.3));
-  EXPECT_FLOAT_EQ(0.531441, hypergeometric_1f0(-6.0, 0.1));
+  EXPECT_FLOAT_EQ(4.62962962963, hypergeometric_1F0(3, 0.4));
+  EXPECT_FLOAT_EQ(0.510204081633, hypergeometric_1F0(2, -0.4));
+  EXPECT_FLOAT_EQ(300.906354890, hypergeometric_1F0(16.0, 0.3));
+  EXPECT_FLOAT_EQ(0.531441, hypergeometric_1F0(-6.0, 0.1));
 }
 
-TEST(MathFunctions, hypergeometric_1f0_throw) {
-  using stan::math::hypergeometric_1f0;
+TEST(MathFunctions, hypergeometric_1F0_throw) {
+  using stan::math::hypergeometric_1F0;
 
-  EXPECT_THROW(hypergeometric_1f0(2.1, 1.0), std::domain_error);
-  EXPECT_THROW(hypergeometric_1f0(0.5, 1.5), std::domain_error);
-  EXPECT_THROW(hypergeometric_1f0(0.5, -1.0), std::domain_error);
-  EXPECT_THROW(hypergeometric_1f0(0.5, -1.5), std::domain_error);
+  EXPECT_THROW(hypergeometric_1F0(2.1, 1.0), std::domain_error);
+  EXPECT_THROW(hypergeometric_1F0(0.5, 1.5), std::domain_error);
+  EXPECT_THROW(hypergeometric_1F0(0.5, -1.0), std::domain_error);
+  EXPECT_THROW(hypergeometric_1F0(0.5, -1.5), std::domain_error);
 }