Pith Number

pith:RDUFUBBO

pith:2014:RDUFUBBOUPBGNFRM3OHAM4KILF

not attested not anchored not stored refs pending

Scaling-rotation distance and interpolation of symmetric positive-definite matrices

Armin Schwartzman, David Groisser, Sungkyu Jung

arxiv:1406.3361 v2 · 2014-06-12 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RDUFUBBOUPBGNFRM3OHAM4KILF}

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	2026-05-18T00:12:11.753779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88e85a042ea3c266962cdb8e067148596631a33047899c09bd5a3771f4c886e6

Aliases

arxiv: 1406.3361 · arxiv_version: 1406.3361v2 · doi: 10.48550/arxiv.1406.3361 · pith_short_12: RDUFUBBOUPBG · pith_short_16: RDUFUBBOUPBGNFRM · pith_short_8: RDUFUBBO

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/RDUFUBBOUPBGNFRM3OHAM4KILF \
  | 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: 88e85a042ea3c266962cdb8e067148596631a33047899c09bd5a3771f4c886e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63cf3b31ab9d26a7bfc31483cb96f798fd1645e400d3c160b692fbc64914929c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2014-06-12T20:07:39Z",
    "title_canon_sha256": "a480cd891f4c50f71d8e2df953341f458b79a46dfe3dcb115216061bc7449f10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.3361",
    "kind": "arxiv",
    "version": 2
  }
}