Pith Number

pith:55XQ4QRU

pith:2011:55XQ4QRUXIEGLIHHHVYQZOTXOV

not attested not anchored not stored refs pending

Intractability of the Minimum-Flip Supertree problem and its variants

Anke Truss, Francois Nicolas, Quang Bao Anh Bui, Sebastian B\"ocker

arxiv:1112.4536 v1 · 2011-12-20 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{55XQ4QRUXIEGLIHHHVYQZOTXOV}

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	2026-05-18T04:05:58.631732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef6f0e4234ba0865a0e73d710cba77757cb2fff11b49bafbad8d49a0743b598e

Aliases

arxiv: 1112.4536 · arxiv_version: 1112.4536v1 · doi: 10.48550/arxiv.1112.4536 · pith_short_12: 55XQ4QRUXIEG · pith_short_16: 55XQ4QRUXIEGLIHH · pith_short_8: 55XQ4QRU

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/55XQ4QRUXIEGLIHHHVYQZOTXOV \
  | 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: ef6f0e4234ba0865a0e73d710cba77757cb2fff11b49bafbad8d49a0743b598e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0750545b284dd4e277cb968e8f3a40c6638f70ac2d5e11a8099030e446fed545",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-12-20T00:32:15Z",
    "title_canon_sha256": "923ee0dbaa1b8059212a8df9336619c1bccb5a0b45fa27fbc090863aa00014df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.4536",
    "kind": "arxiv",
    "version": 1
  }
}