Pith. sign in
Pith Number

pith:6NWK4LCS

pith:2020:6NWK4LCSNSWYBDDVHOYUHWC5B4
not attested not anchored not stored refs pending

Wormholes, energy conditions and time machines

Diego Rubiera-Garcia, Francisco S. N. Lobo

arxiv:2008.09902 v1 · 2020-08-22 · gr-qc

Add to your LaTeX paper
\usepackage{pith}
\pithnumber{6NWK4LCSNSWYBDDVHOYUHWC5B4}

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.

Cited by

1 paper in Pith

Receipt and verification
First computed 2026-07-05T01:29:18.625494Z
Builder pith-number-builder-2026-05-17-v1
Signature Pith Ed25519 (pith-v1-2026-05) · public key
Schema pith-number/v1.0

Canonical hash

f36cae2c526cad808c753bb143d85d0f3a99d4c3b9bd812cab8120fba9b5dc2f

Aliases

arxiv: 2008.09902 · arxiv_version: 2008.09902v1 · doi: 10.48550/arxiv.2008.09902 · pith_short_12: 6NWK4LCSNSWY · pith_short_16: 6NWK4LCSNSWYBDDV · pith_short_8: 6NWK4LCS
Agent API
Verify this Pith Number yourself
curl -sH 'Accept: application/ld+json' https://pith.science/pith/6NWK4LCSNSWYBDDVHOYUHWC5B4 \
  | 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: f36cae2c526cad808c753bb143d85d0f3a99d4c3b9bd812cab8120fba9b5dc2f
Canonical record JSON
{
  "metadata": {
    "abstract_canon_sha256": "8c51e801d3378f386e069370949bb776a8cb3d12e1d485c51c3fe821b8a2efee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-08-22T19:32:53Z",
    "title_canon_sha256": "060ed85ff21e8ee20e171a48826ce7ee8890386bd17ce327104bb3994aba30d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.09902",
    "kind": "arxiv",
    "version": 1
  }
}