Add EP to BP gradient sparsity analysis

EP CIFAR d=256: s(1e-6)=100%, mean_norm=1.41e-04
EP produces networks where ALL samples have non-zero BP gradients,
unlike DFA (0.4%), SB (21%), CB (3%). EP is closer to BP (98.7%).

Updated clean_sparsity_summary.csv (980 rows, now includes EP).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/results/confirmatory/clean_sparsity/cifar_ep_s123.json b/results/confirmatory/clean_sparsity/cifar_ep_s123.json
new file mode 100644
index 0000000..005ccdf
--- /dev/null
+++ b/results/confirmatory/clean_sparsity/cifar_ep_s123.json
@@ -0,0 +1,91 @@
+{
+  "method": "ep",
+  "seed": 123,
+  "d": 256,
+  "per_layer": [
+    {
+      "layer": 0,
+      "mean_norm": 0.00010456332529429346,
+      "median_norm": 6.980952457524836e-05,
+      "support": {
+        "1e-08": 1.0,
+        "1e-07": 1.0,
+        "1e-06": 1.0,
+        "1e-05": 1.0,
+        "0.0001": 0.28125
+      },
+      "r_inf_mean": 0.4620172381401062,
+      "pr_mean": 0.11449450254440308,
+      "hoyer_mean": 0.4635075330734253,
+      "topk_energy": {
+        "1": 0.29893115162849426,
+        "5": 0.4980701208114624,
+        "10": 0.6297639608383179,
+        "25": 0.8313008546829224
+      }
+    },
+    {
+      "layer": 1,
+      "mean_norm": 0.0001045233293552883,
+      "median_norm": 6.978377496125177e-05,
+      "support": {
+        "1e-08": 1.0,
+        "1e-07": 1.0,
+        "1e-06": 1.0,
+        "1e-05": 1.0,
+        "0.0001": 0.28125
+      },
+      "r_inf_mean": 0.4622287452220917,
+      "pr_mean": 0.11440511792898178,
+      "hoyer_mean": 0.4630514085292816,
+      "topk_energy": {
+        "1": 0.2989923357963562,
+        "5": 0.49811261892318726,
+        "10": 0.6300234794616699,
+        "25": 0.8316766023635864
+      }
+    },
+    {
+      "layer": 2,
+      "mean_norm": 0.0001007560349535197,
+      "median_norm": 6.69957953505218e-05,
+      "support": {
+        "1e-08": 1.0,
+        "1e-07": 1.0,
+        "1e-06": 1.0,
+        "1e-05": 1.0,
+        "0.0001": 0.26171875
+      },
+      "r_inf_mean": 0.4833214282989502,
+      "pr_mean": 0.1039460152387619,
+      "hoyer_mean": 0.44482535123825073,
+      "topk_energy": {
+        "1": 0.3238825798034668,
+        "5": 0.5239989161491394,
+        "10": 0.6505527496337891,
+        "25": 0.8411887884140015
+      }
+    },
+    {
+      "layer": 3,
+      "mean_norm": 0.00010035223385784775,
+      "median_norm": 6.629401468671858e-05,
+      "support": {
+        "1e-08": 1.0,
+        "1e-07": 1.0,
+        "1e-06": 1.0,
+        "1e-05": 1.0,
+        "0.0001": 0.26171875
+      },
+      "r_inf_mean": 0.49055981636047363,
+      "pr_mean": 0.09709744155406952,
+      "hoyer_mean": 0.431086927652359,
+      "topk_energy": {
+        "1": 0.3320094347000122,
+        "5": 0.537769615650177,
+        "10": 0.6647151112556458,
+        "25": 0.8509942293167114
+      }
+    }
+  ]
+}
\ No newline at end of file