Pith Number

pith:RHLWVKOO

pith:2017:RHLWVKOOQWQ4HK64GNUOKAGNKZ

not attested not anchored not stored refs pending

Distributed Hierarchical SVD in the Hierarchical Tucker Format

Christian L\"obbert, Lars Grasedyck

arxiv:1708.03340 v2 · 2017-08-10 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RHLWVKOOQWQ4HK64GNUOKAGNKZ}

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	2026-05-18T00:31:18.953303Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89d76aa9ce85a1c3abdc3368e500cd564f3c30967194531df74cf22e9bfef13c

Aliases

arxiv: 1708.03340 · arxiv_version: 1708.03340v2 · doi: 10.48550/arxiv.1708.03340 · pith_short_12: RHLWVKOOQWQ4 · pith_short_16: RHLWVKOOQWQ4HK64 · pith_short_8: RHLWVKOO

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/RHLWVKOOQWQ4HK64GNUOKAGNKZ \
  | 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: 89d76aa9ce85a1c3abdc3368e500cd564f3c30967194531df74cf22e9bfef13c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9cfb48257a0abef825f9ff10d9849ab8df9db1147bba68b7cba2bf6c2031127f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-08-10T18:08:36Z",
    "title_canon_sha256": "ba5e779fcf472ff2673e6195adb034c7b1d4a65b7e58898cec9c6a14327eb9c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.03340",
    "kind": "arxiv",
    "version": 2
  }
}