o
    i                  
   @   s   d dl mZmZmZmZ ddlmZ ddlmZ ddl	m
Z
mZ ddlmZ eeef Ze
Zeddd	ee d
eeef fddZdeeef deded
eeef fddZ	ddeeef dee dee d
dfddZded
eeef fddZdS )    )CallableOptionalTuplecast   )registry)Model)Floats1dFloats2d)	get_widthzCauchySimilarity.v1NnIreturnc                 C   s   t dtt| ddddidS )zCompare input vectors according to the Cauchy similarity function proposed by
    Chen (2013). Primarily used within Siamese neural networks.
    cauchy_similarity   )r   nOWN)initdimsparams)r   forwardr   )r    r   Q/home/ubuntu/.local/lib/python3.10/site-packages/thinc/layers/cauchysimilarity.pyCauchySimilarity   s   r   modelX1_X2is_trainc                    sj   |\}}t td || d   jdd}t|\}dtdtf fdd}||fS )	Nr   r   r   axisd_simr   c                    sN   | }j |dd}d| jdd  | }d|  }|| fS )Nr   r   r   r   r   )ops	reshape2finc_gradsum)r   d_totald_square_diffd_diffr   bp_simdiffr   square_diffr   r   backprop$   s   
zforward.<locals>.backprop)r   r
   	get_paramr#   inverseOutTInT)r   r   r   X1X2totalsimr+   r   r'   r   r      s   r   XYc                 C   sF   |d ur|  dt|d  | j| d}|d7 }| d| d S )Nr   r   r   r   )set_dimr   r    alloc1fget_dim	set_param)r   r4   r5   r   r   r   r   r   /   s
   r   r2   c                    s*   dd   }dt dt f fdd}||fS )Ng      ?r   	d_inverser   c                    s   | d d d   S )Nr   r   r   r   )r:   r2   r   r   backward=   s   zinverse.<locals>.backward)r.   )r2   invr<   r   r;   r   r-   :   s   r-   )N)NN)typingr   r   r   r   configr   r   r   typesr	   r
   utilr   r/   r.   layersintr   boolr   r   r-   r   r   r   r   <module>   s:    "




