Pith Number

pith:NOWPQUSY

pith:2010:NOWPQUSY32EJ7KJYSIYN56T75Q

not attested not anchored not stored refs pending

3-nilpotent obstructions to pi_1 sections for P^1_Q - {0,1,infty}

Kirsten Wickelgren

arxiv:1011.0655 v2 · 2010-11-02 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NOWPQUSY32EJ7KJYSIYN56T75Q}

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	2026-05-18T03:48:13.862982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bacf85258de889fa9389230defa7fec07be0d78900e5ef2ee91e804a457fbbc

Aliases

arxiv: 1011.0655 · arxiv_version: 1011.0655v2 · doi: 10.48550/arxiv.1011.0655 · pith_short_12: NOWPQUSY32EJ · pith_short_16: NOWPQUSY32EJ7KJY · pith_short_8: NOWPQUSY

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/NOWPQUSY32EJ7KJYSIYN56T75Q \
  | 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: 6bacf85258de889fa9389230defa7fec07be0d78900e5ef2ee91e804a457fbbc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a13c7a01d57830e63f6a5033e57e6f9132c1b275cdf3281e36c3bba623f8ff40",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2010-11-02T16:00:36Z",
    "title_canon_sha256": "aaad68e0b2969710f8c873ac16d6a0036f58376e0f8b07c018887beb65dcefcb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.0655",
    "kind": "arxiv",
    "version": 2
  }
}