Issue Date | **Title** | Author(s) |

2018 | **Problems and solutions: a telescoping series with Inverse hyperbolic sine, solution** | *Plaza, Ángel * | |

2020 | **Problems and solutions: a lower bound for a product of integrals** | *Pacheco, José M. ; Plaza, Ángel * | |

2018 | **Problems and solutions: a generalization of a Fibonacci identity** | *Falcón, Sergio ; Plaza, Ángel * | |

2018 | **Advanced problems and solutions: closed forms for sums of series involving reciprocals of shifted Fibonacci squares, solution** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: power-mean and Jensen’s inequalities, solution** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: root and ratio tests, solution** | *Plaza, Ángel * | |

2018 | **Advanced problems and solutions: sums of arc-tangents, solution** | *Plaza, Ángel * | |

2018 | **Advanced problems and solutions: an upper bound for a sum of cubic roots, solution** | *Plaza, Ángel * | |

2018 | **Advanced problems and solutions: the limit of an expression involving double factorials and Fibonacci numbers, solution** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: an infinite series of arctangent, proposed** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: a problem with many solution, solution 2** | *Plaza, Ángel ; Galante Sempere, David * | |

2017 | **Advanced problems and solutions: a cyclic sum inequality, solution** | *Plaza, Ángel * | |

2017 | **Elementary problems and solutions: lower Hessenberg matrix, solution** | *Plaza, Ángel * | |

2017 | **Elementary problems and solutions: harmonic and Fiboancci/Lucas numbers, solution by Kenny B. Davenport, Dallas, PA.** | *Plaza, Ángel * | |

2018 | **Problems and solutions: a mean-value point, solution** | *Perdomo, Francisco ; Plaza, Ángel * | |

2018 | **Elementary problems and solutions: Gelin-Cesáro identity yields a telescoping product, solution** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: an inequality with a cyclic sum, solution** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: simplifying a complicated expression, solution 3 by the proposer** | *Plaza, Ángel * | |

2018 | **Elementary problems and solutions: another application of the AM-GM inequality, solution 1** | *Plaza, Ángel * | |

2019 | **Problems and solutions: a divisibility property of Fibonacci numbers, solution** | *Plaza, Ángel * | |