Pith Number

pith:EVCJ4EYF

pith:2012:EVCJ4EYFJAEQDZH22AFPTJKVNK

not attested not anchored not stored refs pending

A Wronskian Approach to the real \tau-conjecture

Natacha Portier, Pascal Koiran, S\'ebastien Tavenas

arxiv:1205.1015 v3 · 2012-05-04 · 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{EVCJ4EYFJAEQDZH22AFPTJKVNK}

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	2026-05-18T02:51:48.756732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25449e1305480901e4fad00af9a5556ab53b33e518dd7d64e71b72bcd7e19f62

Aliases

arxiv: 1205.1015 · arxiv_version: 1205.1015v3 · doi: 10.48550/arxiv.1205.1015 · pith_short_12: EVCJ4EYFJAEQ · pith_short_16: EVCJ4EYFJAEQDZH2 · pith_short_8: EVCJ4EYF

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/EVCJ4EYFJAEQDZH22AFPTJKVNK \
  | 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: 25449e1305480901e4fad00af9a5556ab53b33e518dd7d64e71b72bcd7e19f62

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d909b263c1c0b854a4dc986a0dd1461b4ec2acc3bf10a1ec669fcb4e1b15be6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2012-05-04T17:40:44Z",
    "title_canon_sha256": "6c702bdcec35c4630d7fc7f6e5323bd7e872d44df94150d831fb3112c5be8434"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.1015",
    "kind": "arxiv",
    "version": 3
  }
}