Pith Number

pith:W7ENI6LR

pith:2020:W7ENI6LRFZDBGA2TXPLNH3DQEI

not attested not anchored not stored refs pending

The charmed string: self-supporting loops through air drag

Adrian Daerr, Bruno Andreotti, Juliette Courson, Margaux Abello, Wladimir Toutain

arxiv:2010.06874 v1 · 2020-10-14 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W7ENI6LRFZDBGA2TXPLNH3DQEI}

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	2026-07-05T01:43:00.596273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7c8d479712e46130353bbd6d3ec70223b7849138476080322948314e2ee6126

Aliases

arxiv: 2010.06874 · arxiv_version: 2010.06874v1 · doi: 10.48550/arxiv.2010.06874 · pith_short_12: W7ENI6LRFZDB · pith_short_16: W7ENI6LRFZDBGA2T · pith_short_8: W7ENI6LR

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/W7ENI6LRFZDBGA2TXPLNH3DQEI \
  | 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: b7c8d479712e46130353bbd6d3ec70223b7849138476080322948314e2ee6126

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3922108c3d47e19c6461f98c0465b52353d020f9a2fa87fb8edd46ed24ac2593",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2020-10-14T08:38:57Z",
    "title_canon_sha256": "913c09aa95b3cf0bac70a827cb71dc16ac25fd7428dfdd74ebccdb4a9f3286b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.06874",
    "kind": "arxiv",
    "version": 1
  }
}