implemented Igamma

ivy/functional/frontends/tensorflow/raw_ops.py

@@ -957,3 +957,17 @@ def Svd(*, input, full_matrices=False, compute_uv=True, name=None):
         "tensorflow",
     )(map_raw_ops_alias(tf_frontend.general_functions.einsum))
 )
+
+
+Igamma = to_ivy_arrays_and_back(
+    with_supported_dtypes(
+        {
+            "2.13.0 and below": (
+                "float64",
+                "float32",
+                "half",
+            ),
+        },
+        "tensorflow",
+    )(map_raw_ops_alias(tf_frontend.math.igamma))
+)

ivy_tests/test_ivy/test_frontends/test_tensorflow/test_raw_ops.py

@@ -4345,3 +4345,43 @@ def test_tensorflow_Svd(
         atol=1e-2,
         ground_truth_backend=frontend,
     )
+
+
+@handle_frontend_test(
+    fn_tree="tensorflow.raw_ops.Igamma",
+    dtype_and_x=helpers.dtype_and_values(
+        available_dtypes=helpers.get_dtypes("valid"),
+        num_arrays=2,
+        shared_dtype=True,
+        abs_smallest_val=1e-5,
+        min_num_dims=2,
+        max_num_dims=2,
+        min_dim_size=3,
+        max_dim_size=3,
+        min_value=2,
+        max_value=100,
+        allow_nan=False,
+    ),
+    test_with_out=st.just(False),
+)
+def test_tensorflow_Igamma(
+    *,
+    dtype_and_x,
+    on_device,
+    fn_tree,
+    backend_fw,
+    frontend,
+    test_flags,
+):
+    input_dtype, xs = dtype_and_x
+    helpers.test_frontend_function(
+        input_dtypes=input_dtype,
+        frontend=frontend,
+        backend_to_test=backend_fw,
+        test_flags=test_flags,
+        fn_tree=fn_tree,
+        on_device=on_device,
+        rtol=1e-04,
+        a=xs[0],
+        x=xs[1],
+    )