Pith Number

pith:D4AOY7UL

pith:2017:D4AOY7UL5LPXZTZO3MPICEX442

not attested not anchored not stored refs pending

Forbidden Time Travel: Characterization of Time-Consistent Tree Reconciliation Maps

Daniel Merkle, Manuela Gei{\ss}, Marc Hellmuth, Nicolas Wieseke, Nikolai N{\o}jgaard, Peter F. Stadler

arxiv:1705.02179 v1 · 2017-05-05 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D4AOY7UL5LPXZTZO3MPICEX442}

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	2026-05-18T00:45:00.484345Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f00ec7e8beadf7ccf2edb1e8112fce6a7ed41c47eb18024ae35e5e38d70d36f

Aliases

arxiv: 1705.02179 · arxiv_version: 1705.02179v1 · doi: 10.48550/arxiv.1705.02179 · pith_short_12: D4AOY7UL5LPX · pith_short_16: D4AOY7UL5LPXZTZO · pith_short_8: D4AOY7UL

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/D4AOY7UL5LPXZTZO3MPICEX442 \
  | 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: 1f00ec7e8beadf7ccf2edb1e8112fce6a7ed41c47eb18024ae35e5e38d70d36f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "648737cfc6c6d92779b987425cc61ad0c0938215f27d2ad5e446dbeec8d71ba5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2017-05-05T11:56:00Z",
    "title_canon_sha256": "5f587a06e6917085e8920e42bd8bb2572588c094ea5b6ccc734337ea5554babf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.02179",
    "kind": "arxiv",
    "version": 1
  }
}