Pith Number

pith:MMFW6QVE

pith:2019:MMFW6QVE3PA3OIZUKECBDJS74W

not attested not anchored not stored refs pending

Weakly regular Sturm-Liouville problems: a corrected spectral matrix method

Cecilia Magherini

arxiv:1907.07615 v1 · 2019-07-12 · math.NA · cs.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{MMFW6QVE3PA3OIZUKECBDJS74W}

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	2026-05-17T23:40:21.583139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

630b6f42a4dbc1b72334510411a65fe591131946745403b219b0893b704762ed

Aliases

arxiv: 1907.07615 · arxiv_version: 1907.07615v1 · doi: 10.48550/arxiv.1907.07615 · pith_short_12: MMFW6QVE3PA3 · pith_short_16: MMFW6QVE3PA3OIZU · pith_short_8: MMFW6QVE

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/MMFW6QVE3PA3OIZUKECBDJS74W \
  | 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: 630b6f42a4dbc1b72334510411a65fe591131946745403b219b0893b704762ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2051cd458f3af711d573337c3019d6707efa44860cd75835156858e0b870d96",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-07-12T14:54:30Z",
    "title_canon_sha256": "e7c0471b53cf4d138fbb58d90d07089d3b4842c6f3b690a1f274300b51b15dfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.07615",
    "kind": "arxiv",
    "version": 1
  }
}