Pith Number

pith:SH6Y56PT

pith:2019:SH6Y56PT43KXTG5ZRE3MFIFHVK

not attested not anchored not stored refs pending

Spacetime Metamaterials

Christophe Caloz, Zo\'e-Lise Deck-L\'eger

arxiv:1905.00560 v2 · 2019-05-02 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SH6Y56PT43KXTG5ZRE3MFIFHVK}

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	2026-05-17T23:47:01.158335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91fd8ef9f3e6d5799bb98936c2a0a7aa91909ed7300ae3cc9c610de05bd03fcf

Aliases

arxiv: 1905.00560 · arxiv_version: 1905.00560v2 · doi: 10.48550/arxiv.1905.00560 · pith_short_12: SH6Y56PT43KX · pith_short_16: SH6Y56PT43KXTG5Z · pith_short_8: SH6Y56PT

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/SH6Y56PT43KXTG5ZRE3MFIFHVK \
  | 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: 91fd8ef9f3e6d5799bb98936c2a0a7aa91909ed7300ae3cc9c610de05bd03fcf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "760bbcdcc4730804cf9446017c4c47ae4ececc24e52a344e9ef3895240214727",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2019-05-02T03:04:02Z",
    "title_canon_sha256": "21ec0ecc4177c52fad710350d000573019d633520b37ecb43ed5d277d5068bf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.00560",
    "kind": "arxiv",
    "version": 2
  }
}