Pith Number

pith:47WNB7WT

pith:2026:47WNB7WT2MD7TZL4LTO6CPFJSB

not attested not anchored not stored refs pending

SurGE: Surrogate Gradient-guided Evolution for Co-design of Legged Robots with Parallel Elasticity

Justin Lu, Sicheng He, Yanran Ding, Yichen Wang, Yue Qin, Yulun Zhuang, Zelin Shen

arxiv:2606.21866 v1 · 2026-06-20 · cs.RO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{47WNB7WT2MD7TZL4LTO6CPFJSB}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-06-23T02:13:01.397665Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7ecd0fed3d307f9e57c5cdde13ca9905be4c147835915280f7073b24da67c0e

Aliases

arxiv: 2606.21866 · arxiv_version: 2606.21866v1 · doi: 10.48550/arxiv.2606.21866 · pith_short_12: 47WNB7WT2MD7 · pith_short_16: 47WNB7WT2MD7TZL4 · pith_short_8: 47WNB7WT

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/47WNB7WT2MD7TZL4LTO6CPFJSB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e7ecd0fed3d307f9e57c5cdde13ca9905be4c147835915280f7073b24da67c0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d204401a96f27a0093d63b837423d37ca5623e5fab4ba29f3bc83b685713a9e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2026-06-20T04:09:24Z",
    "title_canon_sha256": "0d1d7ebabc5e976bbe495d3b3e7232fb617ad89d61f6ad04a70b1667466f7345"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21866",
    "kind": "arxiv",
    "version": 1
  }
}