Pith Number

pith:XBH2MMFM

pith:2018:XBH2MMFMECM75HG6GXPHBKDWAD

not attested not anchored not stored refs pending

Willis metamaterial on a structured beam

Andrea Al\`u, Jensen Li, Jian Zhu, Lingbo Xia, Olivier Mondain-Monval, Thomas Brunet, Yongquan Liu, Zixian Liang

arxiv:1807.02285 v1 · 2018-07-06 · physics.app-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XBH2MMFMECM75HG6GXPHBKDWAD}

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	2026-05-17T23:52:07.386707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b84fa630ac2099fe9cde35de70a87600e9ecae630ade24a65c04a22ba19c3735

Aliases

arxiv: 1807.02285 · arxiv_version: 1807.02285v1 · doi: 10.48550/arxiv.1807.02285 · pith_short_12: XBH2MMFMECM7 · pith_short_16: XBH2MMFMECM75HG6 · pith_short_8: XBH2MMFM

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/XBH2MMFMECM75HG6GXPHBKDWAD \
  | 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: b84fa630ac2099fe9cde35de70a87600e9ecae630ade24a65c04a22ba19c3735

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76965955b2892b25afdcd99ba60c90e0c05f715b099330dc96194564a54bce17",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2018-07-06T07:05:29Z",
    "title_canon_sha256": "67a0ddc618f51eb18b8c0c4f2032eff69668bcdb411d0cc19e4faf1839871e53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.02285",
    "kind": "arxiv",
    "version": 1
  }
}