The diamond lemma by Reyes Villamil, Milton Armando

“…These examples are of interest for modern mathematical physics. The classes of rings we consider include as a special cases: quantum plane, algebra of q-differential operators, (quantum) Heisenberg and Weyl algebras, (quantum) enveloping algebra of the Lie algebra and others. …”

Water Stress in potato, corn and pea crops by Suárez Aguilar, Zagalo Enrique, Sepúlveda Delgado, Omaida

“…The study included the collection and purification of information that has a greater impact on these phenomena such as climatological variables, crop physiology and soil types; Mathematical models that describe evapotranspiration and water needs were designed and adjusted, which were implemented computationally through the simulation of all possible crops under study in the analysis period from 1967 to 2019. …”

Programming logic controllers (PLC) using ladder and structured control language (SCL) in MATLAB by Páez-Logreira, Heyder David, Zamora-Musa, Ronald, Bohórquez-Pérez, José

“…However, LADDER is not friendly in programs requiring calculations of mathematical equations, for example, to calculate the volume of a tank on level control situations. …”

Induced owa operators in linear regression by Avilés Ochoa, Ezequiel, Flores Sosa, Martha, Merigó, José M

“…Statistical linear regression (LR) is a tool used in developing mathematical models for applications in business (Maturo & Hoskova- mayerova, 2017), economics forecasting (Chudik, Kapetanios, & Hashem, 2018), natural sciences (Kilmer & Rodriguez, 2016), engineering (Braun, Altan, & Beck, 2014), and so on. …”

Positive B-splines used as Mappings in the Probabilistic Quantizer by Hoyos-Sánchez, Juan-Pablo, Jojoa, Pablo-Emilio

“…This paper demonstrates how positive B-spline functions can be used as a mapping in the probabilistic quantizer and the mathematical advantages to perform their analysis. In addition, we established a relation between the order of the B-spline and the rendering of conditional moments of the error. …”

Management system ISO 9001-2015: techniques and tools of quality engineering for the implementation by Cruz-Medina, Fanny Liliana, López-Díaz, Andrea del Pilar, Ruiz-Cardenas, Consuelo

“…Similarly analysis and quality engineering makes the necessary inputs in the generation of technical and implementation methods for monitoring and control based on statistics and mathematical models useful for cost reduction, reduction of time and quality improvement processes lives of employees, finally a interrelate with the requirements of ISO 9001:2015 that is standard and tools from the perspective of quality engineering could be applied to ensure the success and sustainability of a system is carried out Quality Management in an organization either goods or services.…”

ALTERNATIVAS PARA ESTIMAR VELOCIDADES EN ACCIDENTES DE TRÁNSITO PRODUCIDO POR MOTOCICLETA by Segundo Agustín Martínez Ovalle, Alejandro Bolívar Suárez, Simón Bolívar Cely

“…The other two resources are mathematical modelsfrom the literature that use as a unique parameter the distance of shortening between axes of the crashed motorcycle. …”

Collaborative inventory coordination model supported in a sociotechnical approach of systems by Palacio-León, Oscar, Barrios-León, Marianna, Adarme-Jaimes, Wilson

“…The first is that the level of service offered follows a deductive approach, using a priori a mathematical definite model. The second one is that the supplier directs the strategy of management of the availability of the collaborative inventory. …”

Evaluación del impacto del uso de agroquímicos sobre el lago de Tota mediante simulación matemática by Grandas Rincón, Isnardo Antonio, Pérez Holguín, Wilson Javier, Pesca Sierra, Yadimir

“…This article presents the results of the mathematical simulation for the model proposed byCentro Panamericano de Ingeniería Sanitaria y Ciencias del Ambiente (CEPIS), to determinethe maximum mass discharge permissible to five agrochemicals frequently used in the nearbyarea to the Lake of Tota-Colombia, considering the assimilative capacity of the lake about theelements contained in such products. …”

The learning curve and its contribution to the human talent performance in organizations: a theoretical review by Cardona-Arbeláez, Diego Alonso, Del Río-Cortina, Jorge Luis, Romero-Severiche, Ana Karina, Lora-Guzmán, Harold

“…It is concluded that the learning curves, although they began in the aviation industry, have been disseminated to various industrial sectors, with the contribution of new mathematical models for their estimation.…”

Problem-solving, Numerical and Variational Thinking in Elementary School: A Review by Barrera, Hugo Fernando

“…Problem-solving and numerical and variational thinking are aspects of mathematical competence in which elementary school students often have difficulties. …”

SentiFuzzy: A Twitter Sentiment Classifier Based on Fuzzy Logic by Timaná-Peña, Jimena-Adriana, Cobos-Lozada, Carlos-Alberto, Anturi-Martínez, Jason-Paul, Paz-Realpe, José-Luis

“…This article presents SentiFuzzy, an algorithm that, based on the characterization of attributes of five sentiment classifiers recognized in the literature, implemented a series of inference rules and fuzzy sets, which allowed to define mathematical weights for each classifier; thus, to know which classifier should be selected according to the nature of the analyzed tweet. …”

Metaheuristic algorithms for building Covering Arrays: A review by Timaná-Peña, Jimena Adriana, Cobos-Lozada, Carlos Alberto, Torres-Jimenez, Jose

“…Covering Arrays (CA) are mathematical objects used in the functional testing of software components. …”

Visualization of urban floodplains in the Amazon foothill using the geo-inspired model of natural vector multi-agents (AVNG) by Millán-Rojas, Edwin Eduardo, Pérez-Castillo, José Nelson, Gallego Torres, Adriana Patricia

“…In the specialized literature, there are different ways to calculate and display flooded areas by geographical entities (rivers or streams), using mathematical and physical models in 1D and 2D areas; also, the use of tools such as Geographic Information Systems (GIS), the diffuse logic, the neural networks, and the genetic algorithms, among others, has been reported. …”

Una comparación de pruebas de igualdad de dos riesgos competitivos by Molina Blanco, Liliana Carolina, Lopera Gómez, Carlos Mario

A Study of the Quantum Correlations in a Tavis-Cummings System by Madrid Usuga, Duvalier, Villamil Barrios, Pablo Emilio

Mol2all-videogame for the stoichiometry learning: identification of the charateristics game and player’s profile by Medina García , Víctor Hugo, Rincón Pérez, Laura Marcela, Otálora Luna, Jorge Enrique

“…For a large part of high school students learning stoichiometry is complex because they have deficiencies in mathematical logic and handling of proportions. This situation demotivates the student during their learning process, which exacerbates the problem of understanding this topic. …”

Representaciones semióticas en números racionales by Granados Niño, Nancy Johana, Jiménez Espinosa, Alfonso

“…This research analyzed the semiotic representations that students handle in the conceptualization of rational numbers; it was carried out with seventh grade students of a private school in the city of Tunja (Boyacá), who presented difficulty in the conceptual apprehension of the mathematical object, since sometimes they did not use at least one of the three cognitive actions related to semiosis denominated by Duval (2004) as identification, treatment and conversion; that is, they did not find the adequate semiosis to reach the noesis (Duval, 2006). …”

Construction of the concept of ratio and constant ratio from the social epistemological viewpoint by Espinosa Romero, César Iván, Jiménez Espinosa, Alfonso

“…This research had its basis on the social epistemology, which criticizes the theoretical mathematical school discourse, and considers that knowledge emerges from situated social practices. …”

Horse´s gait motion analysis system based on videometry by Torres-Pérez, Yolanda, Gómez-Pachón, Edwin Yesid, Cuenca-Jiménez, Francisco

“…This system uses a motion capture software, mathematical calculations, and a graphic interface designed to evaluate locomotor patterns of the horses. …”