Pith Number

pith:A2D6KV2J

pith:2016:A2D6KV2JMLBT36K5BS4TLYK56G

not attested not anchored not stored refs pending

Differential equations and exact solutions in the moving sofa problem

Dan Romik

arxiv:1606.08111 v3 · 2016-06-27 · math.DG · math.CA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A2D6KV2JMLBT36K5BS4TLYK56G}

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	2026-05-18T01:11:17.036151Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0687e5574962c33df95d0cb935e15df18460289a8f78fa579d51196fbfd36532

Aliases

arxiv: 1606.08111 · arxiv_version: 1606.08111v3 · doi: 10.48550/arxiv.1606.08111 · pith_short_12: A2D6KV2JMLBT · pith_short_16: A2D6KV2JMLBT36K5 · pith_short_8: A2D6KV2J

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/A2D6KV2JMLBT36K5BS4TLYK56G \
  | 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: 0687e5574962c33df95d0cb935e15df18460289a8f78fa579d51196fbfd36532

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22634bbff0c4d088df2b5f2e74b3f30b02c9bc59842c116ef7cbe452b6bfb0c2",
    "cross_cats_sorted": [
      "math.CA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-06-27T02:09:32Z",
    "title_canon_sha256": "9996994092f90ddb48f2cbe8727cc9b42e262b0f7bee2a9b74fff92dd076089e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.08111",
    "kind": "arxiv",
    "version": 3
  }
}