Banaz Mohammed Hasan 2025. FPDCnet: A Multi-Classification Model for Classifying COVID-19, Pneumonia, and Normal Chest X-ray Imagery Using Fractional Partial Differential Algorithms. The American Journal of Applied Sciences. 7, 09 (Sep. 2025), 16–25. DOI:https://doi.org/10.37547/tajas/Volume07Issue09-03.