40 citations · 407 across the 63 of their papers we have counts for
9 papers · 1 filter
An ethnoarithmetic excursion into the Javanese calendar
N. Karjanto, F. Beauducel
A perpetual calendar, a calendar designed to find out the day of the week for a given date, employs a rich arithmetical calculation using congruence. Zeller's congruence is a well-…
Peregrine soliton as a limiting behavior of the Kuznetsov-Ma and Akhmediev breathers
N. Karjanto
This article discusses a limiting behavior of breather solutions of the focusing nonlinear Schrödinger (NLS) equation. These breathers belong to the families of solitons on a non-v…
Challenges in teaching Real Analysis classes at the University of PGRI, South Sumatra, Indonesia
E. Septiati, N. Karjanto
This paper discusses our experiences and challenges in teaching advanced undergraduate Real Analysis classes for Mathematics Education students at the University of PGRI (Persatuan…
Mathematical Aspects of Extreme Water Waves
Natanael Karjanto
This thesis deals with some theoretical aspects of deterministic freak wave generation in the wave basin of a hydrodynamic laboratory. We adopt the spatial nonlinear Schrödinger eq…
Discrete solitons dynamics in -symmetric oligomers with complex-valued couplings
O. B. Kirikchi, N. Karjanto
We consider an array of double oligomers in an optical waveguide device. A mathematical model for the system is the coupled discrete nonlinear Schrödinger (NLS) equations, where th…
Wave group evolution and interaction
N. Karjanto
This thesis deals with mathematical and physical aspects of deterministic freak wave generation in a hydrodynamic laboratory. We adopt the nonlinear Schrödinger (NLS) equation as a…