Pith Number

pith:PU4UHM64

pith:2010:PU4UHM64TQRFFOKGVDHNXCXWVW

not attested not anchored not stored refs pending

Ray trajectories for Alcubierre spacetime

Akhlesh Lakhtakia (Pennsylvania State University), Tom G. Mackay (University of Edinburgh), Tom H. Anderson (University of Edinburgh)

arxiv:1101.0044 v1 · 2010-12-30 · 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{PU4UHM64TQRFFOKGVDHNXCXWVW}

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	2026-05-18T02:04:16.541416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d3943b3dc9c2252b946a8cedb8af6adbadd3cb9f25fd29b6bedb89213d7f360

Aliases

arxiv: 1101.0044 · arxiv_version: 1101.0044v1 · doi: 10.48550/arxiv.1101.0044 · pith_short_12: PU4UHM64TQRF · pith_short_16: PU4UHM64TQRFFOKG · pith_short_8: PU4UHM64

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/PU4UHM64TQRFFOKGVDHNXCXWVW \
  | 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: 7d3943b3dc9c2252b946a8cedb8af6adbadd3cb9f25fd29b6bedb89213d7f360

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ecaba8431c9c2dd936790c470e5478da59c128772f98907e5ca8f6ec1d02274",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2010-12-30T07:33:13Z",
    "title_canon_sha256": "4ad76923e020a5384a01c111e55cc941d0d08d68b1986c985295396f9580e0b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.0044",
    "kind": "arxiv",
    "version": 1
  }
}